I can see your point, but when you say that 9/11 is one of the big differences...
I disagree, because the same MSM that shows these piddling little protests, over and over, also show the congresscritters saying, over and over that the war in Iraq doesn't have anything to do with 9/11.
Therefore, a lot of the people that may now be saying they are against it, but once were FOR it, may be succumbing to the constant drumbeat of anti-war propaganda the the libs and dems have been screaming since 2002!
RE: the war in Vietnam, I was too young to know how the war was handled in the run-up to the John Kerry/Jane Fonda anti-war hearings and protests...so I don't know if we are replicating that now or not.