If one person pulls a Nazi flag or throws stones at riot cops, he is an agitator and must be outed. Throwing your hands up and leaving will leave you running circles, and is not very mature.
That's a different story, as evidenced by the fact that you told a different story than the one I told.
If you're in a group and someone starts throwing stones at a cop, you help the cop get that person (at the very least by getting away from that person so you don't interfere with the cop). If you're in a group and a person joins the group and pulls out a Nazi flag, then you kick that person out of the group unless your group sympathizes with Nazis.
If you're in a group and someone starts throwing stones at a cop, you help the cop get that person (at the very least by getting away from that person so you don't interfere with the cop). If you're in a group and a person joins the group and pulls out a Nazi flag, then you kick that person out of the group unless your group sympathizes with Nazis.