It's not a protest vote.
It's ensuring that what happens to Black men will also happen to white men and white women. It's eliminating the possibility of a split fate.
Again, I don't agree with the strategy. But it is not insane, ableism aside.
If a 2028 candidate asks for your advice, asking should they promise to work with MAGA, knowing now what you know about how this 10% of Black men voters would respond, what would you advise that candidate to do? Not rhetorical.