I can't help it. I wish I could be less serious. I'll try... Lets wipe out Mexico, and make 'em grow good weed!
This is a nasty game, not saying i cant think of any i could mention for fun but i hope no one gets hurt feelings.
The USA is a good answer, but I live there, so it doesn't count. When I move to Canada, then it counts!
Israel/Palestina, since it was one country and I don't pick sides here USA of course: hypocritical, sick, powerhungry, meddlesome country. Almost as hopeless as Israel. China, practically for the same reasons. I really like where they're coming from though (not that it was a 'better' country than the average western), but communism didn't do their culture any good.