Suppress All Evils: but You Call Me a Devil?

In order to hunt down the four evil gods, Tang Hao came to the mortal world as a demon god, and was immediately besieged by the demon-suppressing Taoist priests. The murderous demon broke out, and when he was about to massacre Maoshan, he was informed by the system that there was a "four zero four" law, and he could not kill righteous people indiscriminately: But fortunately, the monsters and evil spirits in the mortal world can give vent to his rampant murderous nature. Since then, the world has had a murderous devil who "uses killing to stop killing and violence to stop violence". "Why do you call me Big Devil?" "There is a wicked man who rapes a common girl! I will break his bones to pieces! Shouldn't I do that?" "There is a lich that eats people's hearts! I will cut it into pieces! What's wrong with that?" "There is an evil spirit that refines corpses and controls ghosts! I will crush its bones and raise them to ashes! Can you explain your hatred?" "I am dedicated to killing evil, and I can be called the light of righteousness in the world! I am nothing more than decisive in killing and cruel in my methods!" "But you want to call me a big devil? What a waste of money!!!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.