As I said already, just because someone harass you it’s no justification to kill them. It’s not that hard.
once more, as an example of people *harassing* others, aka not leaving or repeatedly coming back after being told to leave, trying to convert people who stated plenty of times they are not interested. Irritating? Exhausting? Sure. But still no justification for murder.
Actually yes, some ten years ago. I started my own investigation on who this mad guy was and once I discovered his identity I went to the police, NOT to his house with a gun.
all very bad stuff but in no jurisdiction justification for killing someone.