I just need to rant

My dad is being unreasonable. he threatened to get a divorce with my mom bc she told him the party was at 10 but she left at 7. Let me start from the beginning. My dad has always indirectly accused my mom of cheating. When ever she would go out to parties or anything (which is rare). he would tell her that God is watching what she is doing and would take pictures as "evidence"( which is a folder he has on everyone where he puts the bad things we have done) etc. Also my mom would sometimes pick up work (to help pay the bills bc he doesn't have a sturdy job) and would have her workmate work for her Monday afternoons and she works there Monday night on the weekends she works doubles. He would yell at her telling her that she doesn't have a schedule anymore ( again implying that she is cheating) even tho she has been doing it for a while and storm off angry. This keeps happening over and over again and me and my mom have stoped taking him seriously. Untill today when she tells him she's going to a party and the same thing happens again. Me and her joke about it. she gets a call from her friend saying it starts at 6 not 10 and she goes to get ready. her friends are here, she goes tells him bye and leaves (he was on the phone at the time) and he doesn't say anything and kinda ignores her. Later he comes and screams at me to take out the trash and I'm thinking what's his problem but, i don't think much of it bc thats his personality. I hear him stomping around angrily and slamming doors like a big baby (even tho he's 54 and you would think he would have matured by now). Then I hear him call my mom and yell at her. Telling her that she didn't have his permission to leave and that she told him that it was by ten and she left by 7 and said that if she doesn't come home in 2 hours then it would be the first day of there separation, And it's not like she can just come home she got a ride with her friends there. Idk why he's acting like that she is a grown woman. she doesn't need his permission to go anywhere. It's not like he asks her if he can go anwhere. I get that he feels insecure but that's not the way to go about things. They had been married for 20 something years you would think there would be a little trust. He always acts like the world is against him.He makes absurd assumptions and always believes hes right and everyone else is wrong even over the pettiest things( like one time I told him my lunch costed $2.45 and he told me I was lieing and that i told him that so i can buy breakfast at school. and the reason he thinks this is bc It costed less in elementary school. ( I'm in highschool now)) He also gets jellous over the smallest things like my mom cooking breakfast when my brothere come back from collidge since she doesnt usually do that. I just needed to rant. I'm tired of holding everything in. sorry for the long paragraph.