Now I have to ask you the same question that I asked here and which was left unanswered. That is, what are we going to do with those people who did not agree on the laws in the first place? Should they give in to the majority or we'd better send them to concentration camps for subsequent extermination?
You keep saying "the laws" like there's just one list of laws that everyone must follow; you've yet to understand how this works.
Lets do an exercise: name your top 5 laws you'd like to live by. I'll list mine:
1. No murder
2. No thievery
3. No rape
4. No physical abuse, aside from defense
5. In other words, no acts of aggression
So lets compare this to the punishment you've listed:
Should they give in to the majority or we'd better send them to concentration camps for subsequent extermination?
If people willingly go into concentration camps, they'd be lunatics; to get people to get into them requires force, which violates my 4th law. If I violate my 4th law and manage to kill people in attempting to get them into the camps, I'd violate my 1st law, as well as "exterminating" them would violate this law as well. If I profited from this law-breaking, I'd violate my 2nd law; and I won't get into my 3rd law, as that's rather disgusting.
These punishments require me to break my own laws; I would then be a criminal. Assuming I've broken the world's most common laws, I'll never be able to interact with popular society again; I would have to either willingly subject myself to their punishments (which likely will not include death, for I'd otherwise never see the point in it), or continue to live as an outcast until someone, who can spare the blow to their reputation by killing a man, puts a bullet in me.
If you think about it, how would you get away with crimes against humanity? The excuse of "We're doing it to take care of criminals!" doesn't fly with anyone who is halfway awake; just look how that's working out with America and "terrorism".
Punishment works like this: if you interact with the person who has violated a popular law, you then become known for conversing with criminals; people don't want to do business with you then, lest they appear as criminals as well. To stop this, you refuse to interact with the person, and if they're violent, ready to protect yourself if need be, or call the local hired protectors to do it for you. The violator can't get a job; his employer, nor his employees, don't want to work with a criminal, so the violator can't make any money to make a living. The law-violator eventually subjects himself to whatever punishment that would satisfy his peers, or tries to find an area that is more accepting of his type, if that exists, and so lives in his own personal hell. If the violator was dangerous enough, and people agreed that he needed to be killed before he killed another, so he would be. If they'd like to waive or reduce the punishment for the killer, that's how it goes.
There is nobody who "didn't agree on the laws in the first place" since there's no single law-system to agree upon; you have your beliefs in justice, other people have theirs, and if your beliefs clash with other people's, either they or you must adjust.