"Would you like to protest against racism Israel?"
"No"
"Are you sure? It literally won't cost you anything, it's as easy as kneeling down for like a minute"
"No"
"Everyone else is doing it, you'll stand out like a sore thumb as the only guy not protesting racism. People might think you're a racist"
"No"
"You've already got a terrible reputation as a bigot, maybe just kneel so you don't open up this whole extra can of worms?"
"No"
He is really committed to not protesting racism, at the expense of his own reputation. He has a track record of extremely bigoted views. He hasn't, as far as I'm aware, offered up any explanation for his decision.
Occam's razor says he's a racist. If there is another, more nuanced reason that he refuses to demonstrate his opposition to racism, he needs to offer it up before I give him the benefit of the doubt.
(He's also not very bright. I for one am unconvinced he has the intellect for a nuanced opinion on anything to be honest)