who?
> for this
for what?
> deserves to be killed
Who are you to say? What if someone else disagrees, as they likely do? Should any one person have the authority to kill another? Maybe that's why someone is attacking you (in the hypothetical scenario).
It's exactly the opposite - you're spending too much time in the violent-ideology bubble.
Most of the world is law-abiding, avoids violence, and calls the police. Until recently in the US it was almost universal, afaik, that self-defense was the limit of legal violence, and you had a 'duty to retreat' if violence could be avoided. Only recently has the right wing passed 'castle doctrine' laws there. In other countries, people don't buy guns with the idea of meeting violence with violence; in the US, at least until recently, most people didn't have guns.
I didn't say violence didn't exist; I said the vast majority of people are opposed to it as a solution to problems.