All he did was honk his horn at a car that wasn’t moving getting onto the highway. I guess the guy followed him and it got physical. He’s okay and the guy was arrested but do not honk your horn or engage with other people on the road for real.
Horns should be used to convey one short message: “pay attention”.
That’s it. Not “you were wrong” or “i hate you” or “i’m frustrated” or “i want you to move”. All those do are confuse, frustrate, and anger other drivers. I know better but I am still guilty of doing it on rare occasions, usually when someone has just used their vehicle as a weapon and tried to hit me or threaten me.