Except, of course, that the 'alt-right' are actually leftists trying to get the right to accept them, because the left decided to switch pro-white racism for anti-white racism. I give it another generation before they're back in style with the left again.
I don't give it nearly as much time, the black community has been ruled by democrats for 60 years now, in many cities its been 2 generations of things being bad. Trumps been openly reaching out to them and It only takes 20% drifting over for him to win the presidency. Which I think is very possible.
Once that happens well you have seen how left wing extremists treat people who leave, their going to burn bridges like crazy.