WR, I can't tell you what to do. You will need to let your conscience be your guide on this. I do understand how you feel, but you need to rise above his actions and show him that you are the better person. Two wrongs don't make a right. I've been down the road you are traveling and I truly do understand how you feel right now. I was of the same mind set you are about the nasty behavior and then coming back being all nice, etc., but at the end of the day, I waited a while before I provide my xh w/his electronic info.
By providing the resume, it may make things a little bit more smoother for you and the boys and he might cooperate a little bit better...but that's just my two cents. You do what you think you need to do.
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.