Yes one of the great quirks of European history is that the British Empire is not held in the same esteem as the Nazi empire. The British Empire was bizarrely racist and killed tens of millions of people worldwide. Maybe even more than that if you include the promotion of slavery as a business on global scale. England is so lovable now though.
Clearly you feel that anybody of this opinion is in error. Does everyone who posts an article about the nastiness of the (historical) British Empire feel the same way? There are quite a few come up on Hacker News. To me it doesn't seem like England is perceived as lovable at all, in fact I can't imagine where you got the idea.
You mention the Nazis, but I don't think I've ever seen a post about those guys. It's almost as if one needn't hold modern-day Germans accountable for the crimes of their forebears? What a strange idea.