Right now, you need to worry about yourself. It's any wonder you can't stand he sight of him after all that he's pulled. It's very normal feel that way when they try to control, manipulate and make you look like a fool. However, you will need to find a way to put that anger to good use in working on you and finding a way to salvage your credit, etc. Now that you've said what is on your mind, leave it alone.
As for leaving the door cracked...I wouldn't worry about that right now. Your concern needs to be working w/your lawyer and taking care of yourself.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.