If you see making and using anime skins as people as insulting the memory of the brave men and women from wars, then the whole act of recreating the battles themselves, with such ease and with no repercussion, should also be an insult to you.
The idea of filling the role of thousands of people who died for their country, weather they wanted to or not, as just as a game should be torture for you.
I don't have this problem because I know this is a virtual world, I like to leave what others see as a few minor changes, in case they want to see the historic plane, but I will use what I want (which generally isn't anime) on a user skin, this is a game, not reality. I don't mind you disliking anime, everyone has an opinion, but don't act as if people are mocking the name of past heroes for what they do in a game