That would be one possibility, if Jude was reduced to the kind of creature that would maim people to teach them to stay out of the Asylum. However, look at it realistically:
No, it's looking far more likely that it was Johnny Morgan. Possibly he was checking out the Asylum to retrace his roots, get more in touch with his Dad, and ripped off Leo's arm in a moment of aggression. Though he says he didn't kill Leo in "The Origins of Monstrosity", this doesn't mean he didn't try to harm him.