If violent extremists have no choice about how they act, then you should accept that society too has no choice but to reject them. It's just the rain falling, right?

If violent extremists do have a choice, then we can also choose our response to them. And pretty clearly that response should be to ignore their demands and treat them as having abdicated any say in our political system. Otherwise, you validate violent extremism, which creates more violent extremism. Which is bad, right?

There were other choices here. They chose not to make them. It's no one's responsibility to decide other people's bad choices are noble or worthy.