Psst. "Hetalia teaches me history" usually doesn't mean "I believe Hetalia is 100% factual". It usually means that it sparks an interest in people to go do some proper research on their own outside of class. It can also help really well with remembering dates of events. I'm usually terrible with historic dates, but Hetalia's helped me memorize a couple. Sure, there probably are some idiots that think Hetalia is completely factual, but that isn't all of us. I don't think it's even most of us.