Sisters husband

I hate my sisters husband, I refuse to call him my brother-in-law. He’s sexist, racist and a homophobe, he verbally abuses my sister and calls her stupid, says she’s lazy and can’t do anything right, he’s a pathological liar. Before they got married( the day before the wedding) he was in the car with my dad, my brother and his girlfriend, and my sister. I asked my sister to get my bathing suit out of my room so I can go swimming with them later, I was at target getting ‘appropriate shoes’ because his mother didn’t want me taller than the boys and because I was being nice for my sisters happiness I did it. Meanwhile in the separate car he was saying that I never do anything for her and I’m never nice, I talk too much. My dad and brother was screaming at him to shut up and he does know he at all, my sister was crying but didn’t stand up for me. I got in a fight with my mom saying I’m not gonna go, my sister need to find another maid of honor and I’m just gonna go home. I did end up going, it’s one of the worst days of my life. And even after all that, she didn’t say goodbye when she left for her honeymoon. We were all cleaning (by all I mean my family. His did nothing but complain) and she didn’t say thank you or anything. It still bothers me, he’s turning her against us and now they’re expecting, if he hurts that child I’m taking it and my sister away from him. I hate him. He hates me.