You have to ban him at this point (not to ban him pretty much is positive reinforcement that he is untouchable, even by the mods) and asking for a public poll is a bad precedent to make.
Honestly, if two mods were already thinking about banning him, hasn't the question been answered?
For the record, I intentionally avoid threads started by him and do my best to stop reading threads he posts on because I know they'll have nothing worth while in them.
Lastly, I appreciate the mods realizing that some things need to change, especially the douche-baggery that's so common place now. Thank you for that.