AITA for calling my son "the bad seed"?

I have 3 kids. Oldest is a girl, then a boy, then another girl. We always knew there was something different about volume of the kids. The girls are both quiet and respectful. My son however, is notoriously difficult. <br><br>He bites, hits, and kicks. He spits on people and he steals. When he was about 2 he threw my cat down the stairs and after that, we could tell that the cat was living in fear of him. <br><br>We sought professional help, we tried therapy, training, etc. It didn't really make a dent in how he acted. <br><br>My other two seem to live in fear of their brother and I can't say I blame them. My husband is convinced that if we "show how much we love him it will help", and while I understand the reasoning, with no results after years of this, I don't think that's the case. <br><br>That being said, of course we love him anyway. However, I am sick and tired of tiptoeing around the elephant in the room. He is my "Bad Seed", and he brings a lot of stress into our lives and tears down the other two with his awful actions and the manner in which he treats them. <br><br>Yesterday we were talking and he threw a glass of milk at his sister. It smashed and spilled all over her and the cat. I snapped and I just said "you're my bad seed, what more did you expect from yourself?". <br><br>He started crying, but we were all relieved. My husband is furious, and thinks I went too far. My kids seem happier, strangely.