It sounds like you have to walk on eggshells around him to avoid his anger. And I don't think you can have a discussion of the issues, based on your experience in trying to talk to him.

I would follow Rive's advice and would simply just kick him out. Enough is enough. He IS sponging off of you and is mistreating you. If he explodes, he explodes and you call the police.

Just pull that band-aid off, no matter how hard it is, and tell him he must leave. It IS YOUR home after all. No need for a discussion - be firm and remain strong in your stance. He must leave and you will not tolerate this behavior any longer from him.

Do not feel guilty. You are not responsible for him.