Well, I don't think you'd be crazy for saying that but I don't believe it to be true.
I've never sensed any animosity to a non European team, rather I think it's just about the money. More teams means less dosh per team which in turn, to some extent, lowers the market value of the existing teams.
It isn’t cause they’re American, if it was any other team the reaction would be exactly the same. They don’t want to split the money more. I know we all want to make it into an anti-American sentiment, but I genuinely believe they don’t care what nationality the team is.