During the "COLD WAR"; the Vietnam War was immoral to most people...who believed that war was "immoral" to begin with. Example: During WWII, which was a "clear case" of self defense (the Pearl Harbor Attack), people in the US still protested US involvement in that war. The "...reasons about the Vietnam War", would be the same; war is immoral, for those that choose to believe it. For many people there is NO JUSTIFICATION for war.
The majority of people who, at the time, believed that the war in Vietnam was immoral, generally also "believed" that war itself was "immoral." All wars in US history have been protested by it's citizens. A big example was the Mexican War of 1846-1848, in which the present states of California, Arizona, Nevada, New Mexico, were taken to become part of the United States of America. President Polk was afronted by heavy anti-war protests during that war. The settling of the US Frontier by the US Cavalry, the US Civil War, all had protesters against them, often proclaiming "immoral" reasons for those wars. The Vietnam War was NOT a new comer to anti-war demonstrations. But it lasted so long, and drafted so many men, that the protests became unbearable for the White House and the Pentagon. That's what made the Vietnam War stand out.
Some thought the war was 'unjust.' Some believed the North Vietnamese propaganda that the U.S. was the aggressor in the conflict. Some simply didn't want to put their life on the line in the military at war.
One of the main reasons was to separate the Vietnam War from the French War or French Vietnam War (which is often referred to as the French Indochina War; and lately, the 1st Indochina War). To makes things simple: The French Indochina War and the US (American) Vietnam War, might be the easiest way to remember it.
money religion reasons land and for peace
Peace
Because it was immoral.
The majority of people who, at the time, believed that the war in Vietnam was immoral, generally also "believed" that war itself was "immoral." All wars in US history have been protested by it's citizens. A big example was the Mexican War of 1846-1848, in which the present states of California, Arizona, Nevada, New Mexico, were taken to become part of the United States of America. President Polk was afronted by heavy anti-war protests during that war. The settling of the US Frontier by the US Cavalry, the US Civil War, all had protesters against them, often proclaiming "immoral" reasons for those wars. The Vietnam War was NOT a new comer to anti-war demonstrations. But it lasted so long, and drafted so many men, that the protests became unbearable for the White House and the Pentagon. That's what made the Vietnam War stand out.
Military conscription.
Critics of American involvement in the Vietnam conflict, including Dr. Martin Luther King, Jr., considered it unjust and immoral.
to stop the sprend of communism
Part of the cold war.
to fight communism
Ignorance...
Vietnam War
There was a war going on.
To quote some officers in Vietnam, "...the only war we had."
After the Vietnam war the Soviet Union did not attack or overtly support the expansion of Communism through military means. No war stopped as such but Communist agression was forever checked. Stopping the Communist expansion was one of the USA's reasons to get involved in Vietnam and some argue that the war was successful due to this.