I decided to go low contact with dad once I moved out

My dad is Catholic conservative, and I’m bi and leftist. We always get into political arguments, some even ending with him telling me to fuck myself. He also constantly says I’m Catholic when I make it clear I’m an atheist, which is extremely frustrating. I always feel like he doesn’t love who I am but rather loves what he thinks I can be (Catholic conservative). He says," I’m fighting god, that deep down I believe in god, and it’s so damn tiring trying to get him to understand what I don’t believe. Yesterday, I was on a therapy call talking about how I was thinking of getting no contact and having my mom there because I wanted someone in the house to understand because he refused to go to therapy with me. And I also mentioned how I wanted to go in the car because I was done at the Christmas dinner. Basically, we went to our grandmother's home for Christmas dinner and, at the end, I was just tired of socializing and wanted to wait until the car, but my dad thought I was having a medical issue. I literally just wanted to wait in the car because I was tired of having to be happy-go-lucky, and I was a bit dizzy. Yes, this bit is important. After the session ended, I came out and yelled at my dog to shut the f up because it had been barking for hours. At that point, my dad yelled at me and told me to “You shut the f up.” I didn’t engage. Yes, I could have shushed the dog better, but I can’t go back in time. Hours later, my dad banged on my door telling me to come out so we could talk, and he proceeded to yell at me about the stuff I talked about in therapy. I knew he listened in because he brought up me wanting to go to a therapy car which I only mentioned in therapy and my mom says she didn’t tell him. My mom asked him to quit yelling, and he started yelling at her, saying no this is how I am when I’m angry. He said I had been being rude all week. I didn’t realize I was and, yes, I apologized to my grandma and mom since he said I was rude to them, but it’s not that he told me I was rude, it was the yelling. When he’s angry, he yells like I killed somebody like genuinely terrifying, plus he will slam and throw things like his phone or shoes, but he’s throwing chairs and a knife at the wall while raging at my brother before. Also, every time this happens, I resort to shutting off because there is nothing I can do to stop it. I also feel so worthless and starve myself or cut my hair when it happens. I’m just realizing if I wasn’t his kid I’d never even give him my time, and I’m hurting myself by starving myself whenever I do anything that sets off his rage. I bought a drivers test book and saved money to buy a second-hand car I can live in till I can find a job. I’m disabled and have SS, so I can put a decent amount into a savings account, and I’m luckily 18, so I can go once it’s all set. He hasn’t talked to me all day, so yeah.