AIO for not attending my brothers wedding

I (27F) have decided not to attend my brother’s (23M) wedding, and my family is upset with me.
My brother and I have never had a good relationship due to him engaging in abusive behaviors from a very young age. Throughout most of my life I have witnessed behavior from him that I consider manipulative, abusive, and harmful to the people around him. Over the years he has damaged relationships within our family, mistreated family members, and repeatedly behaved in ways that made it difficult for me to trust or respect him.
The biggest issue for me is how he treats his fiancée. They have been together for several years, and I have personally witnessed him belittle her, talk down to her, make degrading comments about women like that he doesn’t believe in rape and women owe men sex.
This honestly messes with me so much because I was in an abusive relationship myself last year. One of the hardest parts was watching people who knew what was happening specifically his family continue to support the person who hurt me. My parents dont condone behavior that was done to me, but when my brother does the same behaviors or similar behaviors they have no problems
Because of that, I struggle with the idea ofsupporting a marriage that I have serious concerns about.
I am not trying to stop the wedding, convince anyone else not to attend, or create drama. I simply told my family that I do not feel comfortable attending because i want to be the one person who if she ever decides to leave knows I never condoned the behavior and will always support her health and safety.
My family thinks I should go because he is my brother and because weddings are about supporting family even when you disagree with them.

AIO for refusing to attend my brother’s wedding?