When I read about this and saw photographs of the Judge and the defendant, I confess to having laughed. I'm not surprised though that its caused a bit of controversy. I don't like foul and abusive language used aggressively, as it certainly was by the defendant. It doesn't seem to have been used aggressively by the Judge, more that she used his language to demonstrate what a nasty piece of work he is.
I wouldn't want to see her loose her job over this. That would be a ridiculous over reaction. I wouldn't want her, or any other Judges, to use that kind of language in court, no matter what the provocation. Anyone who has worked in the court system will have heard defendants, witnesses etc hurling abuse at the Judge in their case and at others who have stood up to them. I don't think it helps if the Judges or others involved join in the f***fest.