It's the same with Germany, I reckon. They did these horrible things 65 years ago, but people still remember and hate them for it. None of us were around to be offended by them, and none of them are now around to have offended any of us. But still this predudice holds on. It's really dumb.
I guess Scotland should still be pissed at us for raiding them during the viking age. And Sweden, I'd apologise for not including you in the Danish/Norwegian kickass kingdom back in the day, but I'm still mad at you for crossing the ice at Skåne and attacking Copenhagen. Damn you for that, DAMN YOU!