AITA for telling my husband that I want a divorce

My husband can be a very angry person and he's refused therapy. He's never physically hurt us but he has broken down our kids doors to go yell at them. My 15 year old has a cat that he loves and he's had him for 2 years. That's his baby. My husband got upset because he was teaching him to drive in my car since he got his permanent. He didn't want to do it anymore because my husband's yelling kept making him anxious so he drove back to the house and he accidentally parked too close to my husband's car and when he opened the door it hit and scratched his car. My husband was screaming at him and I was yelling at my husband that he was overreacting and to calm down or get out. My 15 year old was petting his cat and walking away from my husband. After everything happened quickly. My husband grabbed him. Grabbed his cat. Pushed past me and threw the car in the fucking oven and threatened him that if he ever walked away from him again he would cook his cat from the inside out. My 15 year old started screaming and crying. I pushed on my husband to get him away from the oven and my 15 year old started hitting his dad so they started physically fighting. I took the cat out of the oven and told my husband to get out and I want a divorce. I told him if he didn't get out I would call the cops. He all of a sudden acts really calm and tells me he's calm now. My son keeps hitting me so he said "See. I'm not doing anything back and he's still hitting me. He's out of control." I told him he threatened to kill his cat and he needs to get out. My husband is still acting calm and treating us like we are the crazy ones and said "Fine. I'll stay with my mom and let you guys calm down." The complete 180 was ridiculous. I told him today I'm done. I'm done with his attitude. I'm done with his emotional abuse. I don't want to be with him. Then of course his Mother starts texting me about how I'm awful for trying to end my marriage over a stupid cat and how I'm raising an abuser because my son put hands on his dad. That I should be lucky that my husband didn't put our son in his place and slam his head into a wall. I told her she's disgusting for saying that. She's saying I'm taking everything she said wrong and she's sorry I feel upset with what she said but I'm still awful for throwing out a 18 year marriage over a cat. I feel like this family makes me feel insane.