Most of the racism in Hetalia is of the "haha Italians like pasta and French people are perverts and Americans are hamburger-munching pompous windbags" variety. However, the strips about the Asian nations are quite uncomfortable if you're familiar with the actual history, especially the stuff about Korea. Himaruya's Japanese bias shows pretty glaringly in those strips.

On the other hand, the English dub is a WHOLE OTHER level of DO NOT WANT.