there are people that are good, but either mislead or on the wrong path of some sort. in this case, the person lacks certain part of human-ness called empathy, which you call out; that's a clinical condition called sociopathy. you may notice the irony of invoking empathy on someone who doesn't have it and likely doesn't understand it, having never felt it. high functioning sociopaths can be a very serious danger to any society they're in and you have a great example here.