I'm going to call out my brother, his girl friend, and my mother hypocrites for their parenting choices.
Why does your brother's girlfriend need to be called out?
She told me that if my brother ever misbehaved the way I did the other day she would beat him.
It's sad to hear that your family supports abusive behavior and I'm glad that it's not a thing that you would do. I wouldn't intentionally act to raise any tensions, but I definitely agree that you should civilly have a conversation and address these serious issues. If you are personally being harmed than I advise you to seek help from somebody you genuinely trust and reach out to them immediately.
I will do just that.
You deserve to be treated with respect and feel safe.