You can always take something away from these interactions that you can consider moving forward...either good or bad. The deed is already done so no worries selling in it.
From what I read of his response, you van take away that your STBXH is not the man you want to love you. He is still in la-la land and in fact he seems to be trolling you.
This was just a reminder to you why NC is Good for YOU right now...to help with decoupling YOUR emotions from HIS antics.