I took part in the protests. The bulk of the people largely accepted the arguments. The bulk of congress voted to approve the war. We didn't have to throw lots of people in jail because the protests weren't disruptive enough to matter. Everyone went back to work the next day. At work the average sentiment was that of course Hussein had WMDs and mostly neoliberal handwringing over if it was tactically wise to actually invade or not with a lot of acceptance that it was inevitable.