Can i rant here? 😭

I was a divorcee mom before i remarried. My current husband do provide for my children but never bother to have a relationship with them. He only loves his own children. Yesterday my child (from previous marriage) played with my child with my husband and the child cried. My husband started saying “you’re dumb you’re just plain dumb. Brainless.” Exactly his words to my child. I got really mad i fought with him. Am i in the wrong for being very emotional about this? He confronted me for scolding him infront of the kids and asked why am i so upset because to him he just scolded my child nothing more. I said because he called MY CHILD dumb for something very minor. His reply “u wanna start differentiating children now? Sure” if only this is just a normal relationship where i can just walk away and not look back. He thinks he did nothing wrong and didn’t even bother to apologise