@Scirocco
"If someone attacks a professional fighter and the fighter defends themselves, and the instigator gets hurt, a police investigation would consider the proportionality of the fighter's response. It would probably be considered unacceptable for the fighter to kill the person, kill, torture and injure their family and burn down their home."
I'm not sure of the point you are making.
It would be unlikely that a professional fighter would seek to kill, torture and injure the family and burn down the family home of the aggressor. When they would simply punch the aggressor back in the face.
Or are you minimising the attack on the 7th October as nothing more serious than a punch in the face?