Honestly, I don't think there's anything wrong whatsoever with not feeling "negative" emotions such as grief, guilt, etc. What matters is how you DEAL with the situation, not how you FEEL about it.
For people with ASPD, SZPD, autism, certain psychotic disorders, NPD -- pretty much any disorder that may cause low empathy or flat affect -- it's just a fact of life we don't always (or ever) feel those emotions. (And of course there's way more disorders and symptoms than the ones I just listed, and of course some people who DO have those disorders CAN feel said emotions!)
If you hurt someone and don't regret it, that by itself does not make you a bad person. In fact, if you hurt someone, and want to amend the situation and not hurt that person again IN SPITE OF not feeling guilt? That's amazing. That's amazing and, in my opinion, very selfless.
If you don't feel grief after a loved one dies it doesn't mean you're an awful person who never valued them. As long as you stand by the people who DO feel grief, and offer them comfort or space or whatever, then it's fine that you don't feel it, because you're still being compassionate to those who do.
Honestly even if you feel annoyed or irritated or what have you at the people who are hurting, even that isn't anything shameful, because again it's about what you do, not about how you feel.
Maybe I'm just making defenses for my own ASPD self, but it really doesn't seem like a problem to me. Feelings are private, after all, actions and reactions are what's public, so it matters how you treat others, not how you feel about said others.
Statements like this might make empaths uncomfortable but I stand by it. No one is a bad person just for the way that they "feel", not to mention that a lack of remorse/guilt/sadness/etc is itself a symptom of many disorders and a common trauma response.
