The most infuriating thing to conservatives when arguing with liberals is complexity. Conservatives tend to try to boil everything down to simplicity, the argument always starts when someone says "it's not that simple or clearcut."
That, and their black-and-white position on every issue.
Hyperpartisans on this board are black and white with every position they have, they support what their team does, don't support what the other team does.
How many Obamabots speak out in favor of a republican position over a democrat position on 1 issue?
How many Bushbots speak out in favor of a democrat position over a republican position on 1 issue?
I'd say that equates to less than 1% of the posts by partisans on this board.