Can I get a disagreement to be over with already?
What's the disagreement about?
It's a political matter but he's being both extremely negative and hypocritical at the same time.
Wanting to get out of a very negative discussion is completely normal, especially if it isn't going to go anywhere.  You should simply excuse yourself from the conversation once you realize nothing is going to come from it.
It's not that simple.
It is simple, you can just walk away from the argument and not have to fight anymore. You would feel a lot better if you weren't wasting your time arguing with someone who doesn't seem to be learning anything from it.