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I pity your ignorance and do not approve of your aggressiveness.
The UK, and the rest of the world, call it "football". The Americans, and the Americans ONLY, call it "soccer".
Now this is my opinion but i think the word "football" is better associated with what the UK and rest of the world define football as. American football is tackling, throwing, running and hardly any kicking. So it doesnt deserve the term "football". The Barclays English Premier League DOES, however.
i agree, calling american football "football" makes no sense