@instant_noodle are you brain damaged? If not, then I have no idea how you could derive
that from what I said.
In case you're brand new to the concept of laws, I'll break it down for you: all halfway-decent legal systems assume that those implementing them might be
wrong sometimes. I.E., you don't just convict someone because a cop decided they're guilty; you hold a trial. You don't just immediately execute someone as soon as a court finds them guilty; you allow for appeals in case the court made a mistake. And in the case of life imprisonment instead of capital punishment, if there is
any remaining room for doubt at all, you choose the sentence that could be undone if it turns out you convicted the wrong person while the real murderer is still at large. Because the reality of the matter (and not just the emotional knee-jerk reaction) is that laws are supposed to exist to protect the innocent, not to sate the bloodthirst of the vengeful (no matter
how justified they feel). And life imprisonment is just as effective at keeping a criminal away from society as killing them is.
The fact that so many commentors think condemning vigilantism is "childish" instead of
sane is disappointing, but not surprising.