If all these guys have is this petty regionalist name-calling, it must be pretty bad for them. Heck, let them vent in front of a bunch of like-minded people, all their heads bobbing in unison. They're only digging a deeper hole for themselves.
Maher's show is great for that. You should have heard his audience cheering wildly at every point when Bill read OBL's pre-election statement. It was surreal.
The best way to unmask these people is to give them a mic and let 'em talk. They do all the work for us.