Agreed - those would make someone bad.
I'd argue that enjoying innocent people suffering makes someone bad, not someone you could make a solid case for being deserving of it. If you make the blanket statement "no one deserves to suffer whatsoever", then we fundamentally disagree and it's pointless to argue.
Additionally, there's nothing wrong with actively seeking it out whether or not the deceased are bad. I like knowing what's up with the world. The videos you're referencing are the most authentic version of an information feed. How do you think it gets to the news in the first place? Someone has to review the footage, picture and so forth.
Information is valuable.
One needn't experience empathy in order to be taught reason, and even without reason you don't necessarily know if someone's compulsions would land them on the wrong side.
Additionally, not all manipulation is bad. It would depend on the circumstance, but I'd agree that something which ends up harming someone undeserving would be the rotten side of manipulation.
I think you meant to write "don't feel grief", but even then, so what?
No one's required to feel grief for everyone, so why does it make them a bad person not to when other merely thought the closeness was there? They can't have you import feelings for someone you weren't actually close to. That doesn't even make sense.
But let's pretend you said "When someone dies, I don't feel grief, even when it is someone very close to me."
Well, that wouldn't make you any more good or any more bad a person. How you go from emotionally vacant to bad is a leap I don't understand. If you could sum up someone as having mistreated their close friend/family member while they were alive, that makes them a bad person.
Killing under certain conditions in illegal in certain places, whereas it would be legal in other places under the same conditions. So a person would be bad if they did it in one place but not bad in the other?
The law is pointless when you're discussing ethics. Law is derived from ethics, not the other way around. In a conversation about what action makes someone a bad person, the law is useless.
You realize that killing is part of enforcing the law, right? Would you say a cop killing someone holding an innocent at gunpoint isn't a bad person but someone without a badge killing him is?
So what if one has no remorse or trouble and could pretty much kill anyone without it bothering them? The keyword is "could" - doesn't mean they would. A capacity to do something and an inclination toward it is a misleading conflation. If they did, I'd agree it makes someone bad if the victim was good.
But you'll need to explain why it makes someone a bad person to have no remorse or trouble killing someone "considered bad".