And they don't want to be lectured to about politics or be remind of politics in the middle of something they paid a pretty good amount of money to see to be entertained.
Last time I went to a Football game was many years ago and then for two of us when you rolled in tickets, parking, food and drinks it was insanely expensive for a few hours entertainment.
And if it's politics that makes them uncomfortable to confront that discomfort just adds to the anger.
I saw someone above mention Phil Robinson or Paula Deen. I don't thing that's in the same category exactly, because people were not paying tons of money to come see them do one thing live and then getting something totally different thrown in. Sure, what they did was 10000x different and actually bad instead of for a righteous cause, but they didn't do it in front of an audience that paid big money to see them do their real job- entertain- live.
I have an ex who is a Democrat and die hard Panthers fan and African American- what he said on Facebook yesterday was "can we please just leave on thing that makes me happy and takes me away from all the mess in the world free of politics? Why does it have to go deep into even my Football that I can't go to a game without being reminded of what is already in front of me 24/7 almost everywhere else?"
I suspect a lot of fans of every political stripe agree with him to some degree....