I know what you mean. Just today, when I copyedited a piece, I lowercased communist per Associated Press style, which we follow. the proofer told me I needed to uppercase it, and I said, but! AP! And she said it's our house style to uppercase the party but not the belief system (or maybe it's the other way around, I'm bewildered and totally disagree), and I was thinking, how the hell can people keep ridiculous things like that right? I think that's interesting about not capping nationalities -- I didn't know that!