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America and Europe have had a, shall we say, interesting relationship dating back to the very birth of the USA.
Maybe it all comes down to preferences on how to measure things. Or what the proper size of a milkshake should be. Or, possibly, it was the whole War for Independence situation (though the States did have European enemies and allies in that particular kerfuffle).
No matter what it comes down to, the cultures, cuisines, and habits of folks on two ends of the Atlantic Ocean feel as though they are miles kilometres worlds apart.
Which obviously makes for some pretty great memeage, if you ask me.