Why are dumpers so cold to the dumpee?

aoi05
After three months of breaking up, my ex and I finally talked to each other. We both settled that we don't have any more hard feelings and that we should move on. However, I noticed he was very cold and blunt towards me. This is very different from how he would talk to me before. I was confused because when we broke up, he was the one who said very hurtful things like:

"I can always find love somewhere else. There are other people to love in this world."
"I wish you didn't have your family situation so it'd be easier for me and my parents (my fam situation being my dad having an affair with another woman)."

and I was the one who was EXTREMELY hurt. Also, my ex did not want to talk about our relationship at all. I asked our mutual friend about my ex's attitude, and our friend was like,"he probably doesn't want to dwell on the past because he didn't see the relationship going anywhere. He most likely got over it and wants to move on."

Are dumpers cold because they've moved on already :/?
Updates
+1 y
To add more context, he didn't see a future with me because his parents didn't approve of me for him because of my family situation. They believe marriage is 50% the person and 50% the family. He broke up with me because he wanted to make his parents happy because one of the other hurtful things he said to me was,"My parents' happiness is my happiness. Of course I'm going to go on my whole life trying to please my parents. I will do whatever it takes to make them happy."
Why are dumpers so cold to the dumpee?
3 Opinion