I agree with Money, hanging up was the best thing to do. I would stay NC with him. It is not your problem that he told lies to OW. You should do nothing that helps him out of HIS problem.
The only thing that you did that was anti-DB is you let your emotions get out of control. That is hard but it is something you can work on!
You are right that you can't rationalize with him. Don't try. Stay away from his venom. That is what is best for you.
