Please can someone, in simple terms, explain to me why grown up people who enjoy football, among other sports, find something to object about a few other people whom they don't know personally, squatting on their knees for a few seconds BEFORE a match?

If the match got interrupted a few times for this performance DURING play then I could quite understand someone getting pissed off with it (I would). But BEFORE a match I really can't think of any reason why anyone would object other than they're being racist. I mean if there were some other quick gesture players performed to reject paedophilia for example just about all of us would applaud them; what would it say about the tiny minority who would object?