He is an ungrateful and selfish person. But he has showed signs of regret(?), at least he realized that what he's been doing all his life was not right. The problem is that he feels vulnerable and left out, forgotten and not cared about and now he has to be mean in order not to show that he is hurt, that deep down he knows that he caused pain and feels sorry.
Thanks for the feedback @akiripromise!
Oh! I believe in Heaven too, this was John's opinion on the afterlife, not mine :)