Why do liberals set themselves on fire?

It's weird, I tried to come up with an instance of self immolation by a Conservative. We just aren't given to such wacky practices as that.

Mind you, that does not mean I don't approve of the Liberal habit of self immolation for political purposes. I think it's great! It's one of the few things Liberals do that actually serves society. Keep up the good works, Liberals.