True, they have no interest in discourse, but they're in the minority. The approach you're advocating is no different than the approach they're advocating, only the definition of mad dog is different.

Now, that said, the idea that they have no interest in letting us talk brings up a pretty obvious solution. Eventually, they will do something physically disruptive. Interrupting polite debate. Blocking a legitimate business. Or something more violent. At that point we can punish them for their violence.

But until and unless they do? We leave them the hell alone. Engaging in active darwinism is a very dangerous thing to do, besides being pretty darned arrogant.