It seems like you missed the part where he ran for president and couldn't get there. Pragmatically it was either sleepy Joe or T-bag, so him endorsing Biden was less about him agreeing with DNC policy and more to prevent the return of trump. I can't understand how you don't understand that. Voting is damage control, and the U.S. population not voting for the lesser of two evils in this last cycle has now allowed a swollen, poorly painted, anthropomorphic, pus-filled wart to extort the entire nation and level its financial and military strength against the entire rest of the world. All that said, the biden/Harris admin was complicit in the worst humanitarian disaster that I've been alive for and none of that is okay.