And imagine that everyone "took the law into their own hands" and used guns to enforce their own idea of the law. There are quite a few people who are in jail for many years because, even though they thought the were "doing the right thing" they acted unlawfully. One recent example is the murdering of a young black jogger who was not committing a crime by two white vigilantes, while a third filmed the episode.
Not anywhere near the samething.
This was two, maybe three evil men that went looking for trouble.
We are talking about people defending their own family while on their own property that has been invaded by people set on doing harm.
As long a people respect my property and do not threaten my family with harm they have no worries. Last resort.
BUT, if they threaten my family and I have no other way to protect them, I will use deadly force.
Better they die than any member of my family die.