Well... I am one of those extremists you are proposing to expunge. The thing about the "both parties" thing you are putting forward is that most lefty extremists recognize that in a healthy democracy nobody gets everything they want. That used to be the case with the righties as well. Not so much anymore. Their attitude these days is more of my way or the highway.

BTW - What happens to those "expunged" people? I assume they can still vote... or do we export them to antartica or something???