My mom kicked my dad out and he has nowhere to go but my husband doesn't want him here

My husband and my dad do not get along because my dad doesn't like my husband and has never liked my husband. We've been together close to 20 years since we were 17 and 19 and he's always been rude towards my husband. He recently tried to extend an olive branch by inviting my husband on a camping trip with him and my brother's. He was trying to man up my 14 year old brother because he had been sad and moping around the house about him falling out with his best friend. My dad got sick of it and planned a camping trip to man him up and invited my husband. My husband said no. He's not interested in going anywhere with my dad. My camping trip is WHY my dad got kicked out because he went a little too fat on the trip. My 14 year old brother can't swim. He was scared of water so my dad decided to teach him by just pushing him off a rock into the water and he was drowning and he wouldn't let my other brother save him. He eventually went under and didn't come back up and my brother ignored my dad and went in to save him. He almost drowned and most likely wouldn't have learned to swim that way anyway because the fall hurt his leg. He might have hit a rock on the way down. I don't know all the details. Just that my brother is in a BOOT now and my dad was actually going to make him rough it out that whole weekend with the hurt leg to man him up had my other brother not cursed him out and called everything. This is why my mother kicked out my father. And now my dad has nowhere to go and would like to stay with me but my husband is saying no. He doesn't want my dad here and if I move him in he's moving in with his mom. Any advice on what to do would be appreciated?

Edit: My dad is a complete asshole. I agree with everyone saying that. He's an ass hat of a man. He still is my father and I don't want him homeless.