I'm here for almost 14 years. I don't remember ever saying a bad word about our black players before McKennie. Not for Pogba or Trezeguet (quite the contrary for these two), not Matuidi, not Alex Sandro, not Andrade, not Sissoko, not Asamoah, not Anelka, not Ogbonna, not Kean, not Evra, not Coman ... hell, not even Zebina, Elia or Boumsong.
Which makes your accusation (and it's an accusation) completely baseless.
You might have a stronger argument if you say I don't like Americans. We didn't have another American player to compare. Guess we'll have to wait for that. After McKennie, though, I doubt we'll sign another American, ever.