Muslims follow two sets of law. Most importantly, they follow the edicts of the Qur'an (the Muslim Holy Book) and the Hadith (reported sayings of Prophet Mohammed) as interpreted by the Faqihs (religious jurists). This method of interpretation and the body of law it produces is called Shari'a. Note, however, that Shari'a is used and interpreted very differently between Muslim sects, schools of thought, as well as based on region of application. Secondly, Muslims live in countries that have their own legislation and edicts based on constitutions and statutes and Muslims abide by the laws of those states provided that they do not clash with required Islamic activities (per the Shari'a).
They are believed to be written by a group called the Essenes. This isn't known for sure, but considering where they were found and approximating how old they are, scientists have come to this conclusion.
Islam was revealed to Prophet Muhammad (peace upon be upon him) through revelation of Quran (Islam holy book) by God to him the same way of God revelation of Bible to Prophet Jesus and God revelation of Torah to prophet Moses (peace be upon them all). For more information, see the related question below on why was Quran revealed?
Answer 1No.There is no antagonism between Christians and Muslims. The conflict just started during the Crusades invasion of Muslim countries to seek support of their ruling in home countries. However, there is never hatred or antagonism between Muslims and Christians.Although Christians consider Muslims as unbelievers Muslims believe in the Bible as God holy book and believe in Jesus (peace be upon him) as a prophet. Muslims believe in Allah (or God in English and same God worshiped in Christianity and Judaism) as the one and only one God with no partner, no son, no companion, no father, no associate and no equivalence.Jesus never claimed that he is God or son of God. It is well understood that Islam in its general sense as submission to the Almighty God is the God religion since start of universe creation. Islam per the Bible revelation to Jesus is called Christianity and Islam per the Quran God revelation to Muhammad (Peace be upon him) through the angel Gabriel is called the very name Islam.There is full chapter in Quran named "Maryam" or the virgin Mary. Jesus is mentioned explicitly in Quram more than prophet Muhammad (peace be upon them). Christians are praised in Quran. Christians; as Jews; are decribed in Quran as holders of the book as they are holders of the God holy books of the Bible and Torah; that Muslims believe in their divinity.Quran says about Christians:"You will surely find the most intense of the people in animosity toward the believers [to be] the Jews and those who associate others with Allah; and you will find the nearest of them in affection to the believers those who say, "We are Christians." That is because among them are priests and monks and because they are not arrogant. And when they hear what has been revealed to the Messenger, you see their eyes overflowing with tears because of what they have recognized of the truth. They say, "Our Lord, we have believed, so register us among the witnesses. And why should we not believe in Allah and what has come to us of the truth? And we aspire that our Lord will admit us [to Paradise] with the righteous people." And why should we not believe in Allah and what has come to us of the truth? And we aspire that our Lord will admit us [to Paradise] with the righteous people." . (Quran, Chapter 5, verses 83-85).Muslims never taught to hate any body due to his/her faith, color, or race or nationality. They are taught per Islam and Quran laws to be kind and peaceful to those who are kind and peaceful to them.Refer to questions below for more information.Answer 2This question hinges on the word "always". So, NO, there is not always antagonism between Christians and Muslims. New York City, USA, Toronto, Canada, and Tiranë, Albania are three cities where there is no antagonism between Christians and Muslims even though there are large numbers of both.However, there is often antagonism between Christians and Muslims in countries in the Islamic world because Christians lack many of the rights and protections that their Muslims brothers take for granted. Such rights may include (depending on the country): right to proselytize, right to build new houses of worship, right to petition for grievances, equality in testimony, rights to receive land or money as inheritance from Muslims, right to freely convert to Christianity, etc.
The system that regulates family life moral conduct and business is extracted from Quram. They are listed as follow (together with the relevant Quran chapter and verse(s) given respectively in brackets at the end):Respect and honor all human beings irrespective of their religion, color, race, sex, language, status, property, birth, profession/job and so on [17/70]Talk straight, to the point, without any ambiguity or deception [33/70]Choose best words to speak and say them in the best possible way [17/53, 2/83]Do not shout. Speak politely keeping your voice low. [31/19]Always speak the truth. Shun words that are deceitful and ostentatious [22/30]Do not confound truth with falsehood [2/42]Say with your mouth what is in your heart [3/167]Speak in a civilized manner in a language that is recognized by the society and is commonly used [4/5]When you voice an opinion, be just, even if it is against a relative[6/152]Do not be a bragging boaster [31/18]Do not talk, listen or do anything vain [23/3, 28/55]Do not participate in any paltry. If you pass near a futile play, then pass by with dignity[25/72]Do not verge upon any immodesty or lewdness whether surreptitious or overt [6/151].If, unintentionally, any misconduct occurs by you, then correct yourself expeditiously[3/134].Do not be contemptuous or arrogant with people [31/18]Do not walk haughtily or with conceit [17/37, 31/18]Be moderate in thy pace [31/19]Walk with humility and sedateness [25/63]Keep your gazes lowered devoid of any lecherous leers and salacious stares [24/30-31, 40/19].If you do not have complete knowledge about anything, better keep your mouth shut. You might think that speaking about something without full knowledge is a trivial matter. But it might have grave consequences [24/15-16]When you hear something malicious about someone, keep a favorable view about him/her until you attain full knowledge about the matter. Consider others innocent until they are proven guilty with solid and truthful evidence [24/12-13]Ascertain the truth of any news, lest you smite someone in ignorance and afterward repent of what you did[49/6]Do not follow blindly any information of which you have no direct knowledge. (Using your faculties of perception and conception) you must verify it for yourself. In the Court of your Lord, you will be held accountable for your hearing, sight, and the faculty of reasoning[17/36].Never think that you have reached the final stage of knowledge and nobody knows more than yourself. Remember! Above everyone endowed with knowledge is another endowed with more knowledge [12/76]. Even the Prophet [p.b.u.h] was asked to keep praying, "O My Sustainer! Advance me in knowledge." [20:114]The believers are but a single Brotherhood. Live like members of one family, brothers and sisters unto one another [49/10].Do not make mockery of others or ridicule others [49/11]Do not defame others [49/11]Do not insult others by nicknames [49/11]Avoid suspicion and guesswork. Suspicion and guesswork might deplete your communal energy [49/12]Spy not upon one another [49/12]Do not backbite one another [49/12]When you meet each other, offer good wishes and blessings for safety. One who conveys to you a message of safety and security and also when a courteous greeting is offered to you, meet it with a greeting still more courteous or (at least) of equal courtesy [4/86]When you enter your own home or the home of somebody else, compliment the inmates[24/61]Do not enter houses other than your own until you have sought permission; and then greet the inmates and wish them a life of blessing, purity and pleasure [24/27]Treat kindly" Your parents, Relatives, The orphans, And those who have been left alone in the society [4/36]Take care of The needy, The disabled, Those whose hard earned income is insufficient to meet their needs, And those whose businesses have stalled, And those who have lost their jobs. [4/36]Treat kindly " Your related neighbours, and unrelated neighbours " Companions by your side in public gatherings, or public transportation. [4/36]Be generous to the needy wayfarer, the homeless son of the street, and the one who reaches you in a destitute condition [4/36]Be nice to people who work under your care. [4/36]Do not follow up what you have given to others to afflict them with reminders of your generosity [2/262].Do not expect a return for your good behaviour, not even thanks [76/9]Cooperate with one another in good deeds and do not cooperate with others in evil and bad matters [5/2]Do no try to impress people on account of self-proclaimed virtues [53/32]You should enjoin right conduct on others but mend your own ways first. Actions speak louder than words. You must first practice good deeds yourself, then preach [2/44]Correct yourself and your families first [before trying to correct others] [66/6]Pardon gracefully if anyone among you who commits a bad deed out of ignorance, and then repents and amends[6/54, 3/134]Divert and sublimate your anger and potentially virulent emotions to creative energy, and become a source of tranquility and comfort to people [3/134]Call people to the Way of your Lord with wisdom and beautiful exhortation. Reason with them most decently [16/125]Leave to themselves those who do not give any importance to the Divine code and have adopted and consider it as mere play and amusement [6/70]Sit not in the company of those who ridicule Divine Law unless they engage in some other conversation[4/140]Do not be jealous of those who are blessed [4/54]In your collective life, make rooms for others [58/11]When invited to dine, Go at the appointed time. Do not arrive too early to wait for the preparation of meal or linger after eating to engage in bootless babble. Such things may cause inconvenience to the host [33/53]Eat and drink [what is lawful] in moderation [7/31].Do not squander your wealth senselessly [17/26]Fulfill your promises and commitments [17/34]Keep yourself clean, pure [9/108, 4/43, 5/6].Dress-up in agreeable attire and adorn yourself with exquisite character from inside out[7/26]Seek your provision only by fair endeavour [29/17, 2/188]Do not devour the wealth and property of others unjustly, nor bribe the officials or the judges to deprive others of their possessions [2/188]