He's commenting on shit Americanisms, or, complicated rules in our sport. Personally I don't mind who takes part in sport provided they don't start to try take over it. Soccer, The half, calling attack offence, the list is long and getting longer. Keep it in America unless it's worth sharing. No disrespects to the American blues, it's a generality and was fair comment from @blue1948
I know what you mean. I'm constantly being told to keep my shit Englishisms out of the country over here. Things like calling wide receivers strikers, the plate the wicket, and calling the shortstop silly mid on. Seeing how much it annoys the natives, I can see how this annoys you.