I dont know about you guys, but we were taught in the school yard that "sticks and stones may break my bones but names will never hurt me"
You ask if I could keep calm in that situation? I have no doubt I could, say what you want about my mother, my father whomever, I dont care. Only if I valued your opinion would it bother me. When someone calls names like that, they are doing it with the express purpose of getting you angry, its much more satisfying to not fall for the bait (the same way you should deal with trolls, ignore them).
I cant watch football anymore, its an absolute joke, supposed "adults" acting like little kids. Its sickening the way "proffesional" footballers act, and the amount of money they get payed. Ive totally given up on the game.