Sure they will. That's what we thought back in '68 and "days of rage" and all that Shiite. Didn't happen, won't happen. (To any great extent, there were a few hardhats that bashed a few hippies, back in the day)
And I was one of them, and curious as it might seem, I was wearing a hard hat, 1968.The SDS freaks were outraged.
And if the Dems call out their Wingnut "Bring the Troops Home" crowd, THIS time they will be challenged in the streets. Even if its done by Freepathon.