Is it worth stayinf for the sake of a disrespectful 11 year old daughter?

My husband and my daughter came back here to get some things. As me and my husband were trying to talk about the situation, my daughter wont stop yelling "Shut up!" "You don't use your brain!"

But my husband smirked in triumph! Looking so proud of what his daughter is saying.

I don't know in which way I can speak to my daughter. I tried being quiet and not make any reactions, but she was yelling abusive words towards me.

After the incident last Wednesday, when my daughter almost push me down the stairs, it's absolutely a lot worse now. It sounds like she has been brainwashed so much. She uttered a lot more negative insults towards me.

I am fighting to stay, but I don't know what has been said to my daughter. She seems not to have any remorse at all.