Try not to fight fire with fire - you don't want to become that which you despise.

Please never blame someone else for your choice to attempt suicide.
And try not to focus on his race, gender, sexual orientation, income or anything that has nothing to do with the quality of his character.

I'm not saying these things to shame you, but trying to bring to your awareness that evil can be highly contagious, and you want to make sure to keep it off of you. It can be a very sneaky and insidious thing, feeding on your pain over time.

That said:

Your best bet is to completely ignore him. Go "No Contact" (can google that for tons of good resources if you're interested), and do not engage, do not react. Completely ignore him. Emotionally sadistic types, emotional vampires, narcissists after "supply" - whatever - just want a reaction. If they realize you are a dry well in that regard, eventually they move on.

If his threats ever escalate to the point of implied violence or worse, call the police and report it immediately.