I don't care for their arguments. They can think what they want. If somebody comes up to you and says "you are not you," are you going to argue with them?
I don't need to waste my time like that.
If it was just rhetoric, I'd be with you on this. Unfortunately, it's not. They are aggressive, violent, and purveyors of extreme hate. You need to look at them like you would an Islamic extremist. You may not have an issues with someone believing in Islam, but when those beliefs translate into a dangerous environment and an inability to peacefully coexist, we have a problem that demands more than a dismissive shrug.