Killing someone disarmed doesn’t count :\
Isn’t this exactly what a villain would do?
Anyone can kill someone unarmed with no skill, that’s not threatening :\
Tricking your father into believing you’ll come home and end this path of evil you’re going down only to stab him and tell him “Thank you” is pretty heinous dude. I don’t even think Vader would do something that vile. Much less to a family member.
Vile, but not threatening.
I’d also like to add that Kylo was pretty much an angsty teen who was proving his loyalty to the gang, and that he’s ‘real bad’, by swiping the Butterfinger from the grocery store. Or, in this case, by murdering his father, with whom he obviously didn’t have a good relationship anyway.