I have to agree with you in that thing about Hetalia fandom... I am Hetalia fan, but I don't like lots of fangirls, because history was NEVER kawai... -_- And I know, that lots of people can hate Hetalia, but that anime is also good because it can force people to study history. And some fans as me, take history serious. I also don't like yaoi.
So, I understand you, but please, don't think, that every fan of Hetalia is crazy and yaoi-loving person.
(I hope, that you know, what I want to say, my english is not good. )