BS. Minus Vietnam these idiot radicals were still there spoiling for a fight. They just would have chosen some other cause.
Plus you have to remember that Vietnam was about containing Soviet Communist expansion. It was part of a strategy that worked -- where is the Soviet Union today?
Finally, don't let the history revision get to you: In spite of horrible political and military leadership, we won the Vietnam War. Unfortunately, our treasonous democratic congress surrendered South Vietnam after the war was over.
It really is a shocking revelation to some that the anti-war movement was mostly about using easily confused colleges students as an instrument of war.
Some are embarrassed, some are mad about being used.