Answer:
My answer is not only based on the chart.
Explanation:
The number of American deaths was getting outrageous but the main reason people started to protest is to protect the Vietnamese. America was killing millions of innocent women and children for no apparent reason. For organizations such as the Students for a Democratic Society (SDS), the National Mobilization Committee to End the War in Vietnam, the Black Panthers and the Youth International Party (the Yippies) had had enough of being responsible (in a way) for these deaths.
if you need interesting info, "The trial of Chicago 7" on Netflix explains the situation perfectly.
Hope it helps :)
