Heather, So, he reached out because of the holidays. You have to pity the poor soul because he has made the decision to remain stuck, just as HaWho has mentioned.
What do you do...shake your head and so "oh, well, he's still down in the rabbit hole". Don't allow him to dictate how you should feel. Yes, he was a blip on your radar screen for the holidays, but I had the warned the posters every year that they come peeking out of the old rabbit hole around the holidays. Try to learn not to react to what he does. For instance, I wouldn't have sent him an angry text. I would have let it go because they crave attention, be it negative or positive and yes, you basically gave him the entire kibble on a silver platter by texting him. Learn to ignore his texts unless it's something of importance. such as child support.
Heather, you don't owe this man the time of day because right now, he's trying to drag you back down into the rabbit hole w/him, i.e., he's miserable and he wants you that way too.
Cut the cord, learn not to react to his behavior and leave him twisting in the wind...after all...you are now divorced. Your girls are old enough and smart enough to deal w/him in their own way.
Step back, leave him out there to twirl in the wind.
After all of that...Merry Christmas!
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.