Hey! Maybe he should have left the Nazis out of it, ya think?
Maybe Jesus was a Nazi, Hmmm? There's a nice thought provoking discussion topic. Maybe the Pope is a Nazi. Maybe you're a Nazi. Just food for thought!
That's actually one of my favorite retorts to liberals who just go around mouthing about how Bush is a fascist. Something along the lines of, "Well, that's original. But actually, I believe you might be a fascist. Prove me wrong?"
You have to say it in a cheery voice, of course. Completely throws them for a loop.