Now I am just like "he is such a jerk, I hope he gets what's coming to him." That is bad, I know, but it is true. I will try to get the compassion back.
Detachment is a difficult balance. Don't care too much, but care just enough not to become completely apathetic.
FWIW, HesAble, I have those kind of thoughts too from time to time, but they tend to be fleeting and replaced soon enough by more of a compassionate indifference, if I don't dwell on them. I think it's helped me to acknowledge that attitude when it comes and not beat myself up for feeling that way, but to actually try to detach from the feeling itself too. I don't feed it, if that makes sense. I let it pass through my mind and body (because the thought is often attached to feelings of hurt, anger, sadness), and move on to whatever else I'm doing in the moment, and it dissolves eventually. I figure the less I focus on it, the more room will be made for compassionate indifference in its place.