GUEST, it's pretty simple. You are anti a nationality if you have a general dislike (or hatred) for most things associated with that nationality. Sometimes it stems from a disagreement over political policy, and sometimes from a (possibly) justifiable dislike of just a few people which then expands to cover the entire country or ethnicity.
Right now, for instance, some would describe me as anti-French. I'm not, although I'm not too happy with their present stance on the war because I happen to feel that their stated reasons are at direct odds with what I feel are the real reasons. And I'm not the only one who feels that way. But I'M not anti_French.
The true "antis" are the ones who can find almost nothing good to say about a country or its people and say it at every opportunity and at some length.

troll