So how do you remove people like these, and I'm talking about both sides, from a civil society? They sure aren't going to remove themselves.Yes. That really sounds like a great strategy!! Buy a couple thousand body bags and just start mowing them down with machine guns until none are left standing. Over the top statements like this one are just as terrible as a misguided protester who has gone too far. Both are ridiculous and have no place In a civil society.
See, the similarity between the "protestors" and the people who say things like, "just kill them all", is that both have been pushed too far. The difference however, is that the protestors are idiots, they don't know or even care about the truth, they are selfish, they are hypocrites, they're lazy, and they're ignorant. These characteristics will not change, even if they got exactly what they wanted, they would not change. They want to bring society down to their level rather than rising up to the challenge and meeting society at it's level.
The extremists on the other side however, they will change. Their attitudes will go right back to normal and "civilized" once the irritant is removed. They will sink down to the level that is necessary to deal with the situation they're in, and then they'll rise back up.