I understand why Kobe gets that rep, I respect his game, but I don't know why MJ is known as a "killer" when LeBron isn't. MJ has 0 career ejections, 52 career techs, and 2 career flagrants. Meanwhile, LeBron as 2 career ejections, 90 career techs, and 8 career flagrants. He had a career high of 10 techs in one season, whereas MJ at his best only had 5. LeBron is much more dangerous on the court than MJ ever was, and is more likely to bite when provoked. MJ just barked, and had to recruit guys like Rodman to do his biting for him. LeBron did his own biting when pushed far enough, which is rare since he's a scarier dog anyways.
https://www.espn.com/nba/player/stats/_/id/1035/type/nba/seasontype/2
https://www.espn.com/nba/player/stats/_/id/1966/type/nba/seasontype/2
Kobe was a true killer though. Bro was out for blood every night. He has 7 career ejections, 196 techs, and 9 flagrants.
You realise MJ straight up punched his own teammate at practice? Bullied other players on his own team into a shell of themselves, took free throws with his eyes closed during games. That aside I think you are misinterpreting what people mean when they say these players are killers.
No one refers to killers in the sense you are talking about, by how violent they are. Otherwise Ron Artest would be considered the biggest killer ever lol he was punching fans. They reference it based off their competitive spirit and not accepting anything other than victory and being able to deliver on that time and time again through clutch plays when their team looked for them to deliver.