Is it normal that my family hates me because i stood up against my father?

My father is an abusive asshole. He always mistreated my mother, my siblings and me. He cheated on my mother and always treated her like a maid, even though my mother is a professional as well. We never said anything, because my father supported us economically through all our lives and because he was also quite aggressive. He threatened me and my mother with a gun more than once.

He left our home for several years. After that, he came back, but my mother made him promise that he would change. My father swore that he would, with tears in his eyes. However, as expected, he never did.

I ran away from my home when I was 16, because I couldn't take it anymore. After a month, my father begged me to come back (again, with tears in his eyes), and he swore that he would seek professional help. He never did, but he became a little more contained, at least in front of me.

The thing is that I am not a kid anymore and I don't need my father's money anymore. So, whenever my father makes something bad, I tell him right away to stop being an asshole in the most direct way possible. However... now my siblings and my mother hate me. They say that I am "disrespectful" with my father. My mother says that I am just making "too much drama" out of it. It is as if everyone had amnesia. Suddenly, my father was always a great person and I am just a rebel.

I just don't understand how can my family act like this. I suppose they just don't care as long as they have the money. I am scared that my sisters in particular will be beaten by their husbands and then stay quiet about it. And well, I guess I am scared about the fact that my brothers will beat their wives as well.

And well.... I am just here wondering... am I really being the bad guy here?