I'll bet there are some Occupy campers who are a bit tired of having old hippies telling them stories about the Vietnam War protests. But there is a subtle distinction I have not heard voiced yet - here is it. When we were protesting against the war in the late 60s and early 70s most of our parents were not with us. For them the United States at war meant World War II, pretty hard to be against that war when on the other side was Adolf Hitler. My father's reasoning on Vietnam was - "our boys are fighting and dying over there and we need to support them." In my late teens I was protesting a war, at that same age he was in one, so was everyone else in the country.
But in the 60s the "adults" did not make a distinction between the fighting on the ground in Vietnam and the insane policy in Washington D.C. which was also based on WWII mentality. The flag waving obscured the questions of policy and any rational basis for what we were doing in Vietnam.
Flash forward to today, we are all part of the 99%. We are on your side, marching with you against some incredibly over the top reactions on the part of local police, mayors and governors. But listen carefully to your elders about this because it really has very little to do with what the local mayor wants. These marching orders are coming from Washington. The good news is that you have struck a nerve, they are afraid we will wake up too many of the 99% and it will cost them their places of privilege.
For anyone who doesn't believe Washington, the Department of Homeland Security and yes, Barack Obama are not behind the militant crackdown on Occupy. Here is an article from the Guardian for you. For those who believe as I do that this is an organized repression, the article is most enlightening.