I really doubt he just did a 180 on being a klan leader turned anti-civil rights politician. He was an opportunist who saw a chance to gain more support by supporting more progressive policies. It’s good that he started supporting civil rights, but he and politicians like him will turn their backs on progressivism the moment it benefits them, which scares the shit out of me in times like this where conservatives are getting more radical and violent all the time.
Idk what the context for biden being with them is, but politicians take photos with all kinds of people though, even politicians on the other side of the aisle. It’s part of the political game, and based on the picture alone I wouldn’t judge him too hard just for having a picture with them