Is there a word for my husbands problem

My husband makes extreme scenarios in his head but he truly thinks it’s real and legitimate ruins our lives over it. Many many examples, one his brother was staying over and my husband went outside to the shed, when he came back in a few minutes later he grabbed me into the room and screamed at me that his brother looked suspicious and he knows we are doing something. He pinned me down and made me cry. He truly thinks I did something. Or I was driving home and he watches me on the GPS, he says the connection went out and said I couldn’t be tracked and he truly believes that I had sex with someone under 3 minutes and that is why my connection went out. He will once again pin me down and force me to pull my pants down. Then he says my discharge is semen. Actually whenever I have discharge he says it’s semen and will rape me because he wants sloppy seconds even when I beg him to stop. Or he says that when he touches me in my sleep I push away and start almost crying (I can’t remember this because I’m sleeping) and he says it’s because my brother raped me as a child and he truly believes my brother and I have a sexual relationship (WE ABSOLUTELY DO NOT!!!) In my husbands head he truly believes I am doing all these things even when they sound crazy he 100% believes them. He has had this problem since he was a child (like saying his mom almost abandoned him for a celebrity, obviously this didn’t happen)

He does also say things like he will one day snap and kill me or if I leave he will kill me because he won’t let another wife leave him and break his heart again (he’s been divorced once). I’m unsure if he’s being serious or if he’s truly being serious it’s hard to believe that someone I fell in love with and had children would do that especially him.

Any idea what this could be called?