Hi redrosesdz,
You have set boundaries and he has crossed the line, the time has come for you to stick to your boundaries and for him to move. Do NOT beat yourself up over this, it was his choice to drink, damage the house and threaten his mother and there have to be consequences for his actions.
If you allow him to stay, you are enabling him. Please, consider the damage that he is doing to your other son and yourself by acting this way and follow through. Do not help him financially either as this will also be enabling him. He is a grown man and needs to experience the reality of his bad behavior.
I'm very sorry that you are going through this but stay strong Mom! Al Anon will show you some answers so I hope you make it there asap.
H4L