Reincarnation of a Martial Prodigy - Chapter 20

The dudes are brain dead. He killed the guy from the group causing him a problem. He hasn’t bothered these guys at all, just basically warning them to not go too far. So what do they do? Despite knowing who he is and his connections, they go too far. Did they actually think that if they were able to kill him, that there wouldn’t be people investigating? They’d be sussed out in less than a day.