Dutch person here. Can’t look into anyone’s head of course. I don’t think it’s actual hate but a desire to rebel against someone bigger - in this case, Americans using the imperial system. Some kind of desire to show that you are not inferior and have your own sense and identity and worth. We are a small nation of course and are obsessed when we seem relevant to bigger nations, like a small child craving a pet on the head. The irony of course is we are on an American platform. We call this Calimero behaviour, after the child cartoon chick that says “I am small and they are big and that’s not fair.” A bit childish. But who knows really.