Why do Americans think France hates them?

When I say I'm French, I often get the reaction from Americans: "But why do you hate us? "

Well, I'd like to say that the majority of French people don't hate Americans, and that I've met some extremely nice people on this site, and they're Americans.

The funny thing is that many French people also think that Americans despise and hate France.
Why do Americans think France hates them?
Why do Americans think France hates them?
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