C’mon man- calling someone (specifically a person of mixed race) a “mutt” is disgusting and in incredibly poor taste, to say the least. You don’t have to like him- call him Kermit, chipmunk voiced, a whiner...but that term is crossing a line. It’s not being sheltered or sensitive, it’s just a modicum of decency!
It's only racist to object to it being used because Italians use it in normal profane discourse, since I was a little kid...and earlier. So, to call someone racist for saying "mutt" as a derogative implies you HATE half of my family. Maybe everyone should STOP pulling this stupid race card crap every time one's feathers get ruffled.
I mean, he used "mutt" because it was a specific pejorative reference to Mahomes as mixed race. He didn't call him an *******, Kermit the Frog, loser, whatever other insult you want to throw his way. It was a specific reference to his parentage.