Don’t know that I would call it a routine. He probably was set off once he realized he had blood streaming down his face.
Beef Stew confronted lebron after getting popped, he didn't get the right response. So seeing the blood and Lebron's response set him off.
Anyone calling Lebron's actions not intentional is kidding themself. He clearly looked over and swung that arm, and this was on a made shot.