As to why they still have supporters - I can't really explain that aside from "they're hurting the right people."

Don't underestimate how hard it is to admit you're wrong when you're strongly invested in an ideology which is:

I'm always correct, I'm always winning, I'm strong, I'm alpha and nothing is every my fault nor am I ever responsible for anything

I interact with MAGAs on Reddit, it's sadistic but I really cannot stop because I just cannot believe people believe in the things they do. All I can say is these people have really really bought the lies, hook line an sinker. It's dangerous and I don't see how it's going to change anytime soon. The only way I see the spell breaking is economic catastrophe, even then these people would believe it's not Trump's fault, or the current admins fault, it would be Biden's fault.