Trump has a cult of personality that took years to build, and isn't simply transferred to someone else. MAGA doesn't survive if he's gone. Will there still be fascists, racists, and so on? Yes, but they won't be unified anymore, and they won't be grouped together with the rest of the right anymore either. This will be good for the left in the short term because the right will be less powerful, but also bad for the left because it won't be as easy to attack the right.