Morality of the Matrix

Of course he would have committed a crime. I believe morality is based upon all aspects of things that you know. The child was not acting immorally, just ignorantly, and the person who murdered is guilty of such, as they know they're killing someone.

Also, I believe, that the Matrix is actually a true world, because that is what everyone in the Matrix perceives it and accepts it to be.

The denizens of the Matrix had zero control and were totally disempowered by an outside force which had conquered their ancestors.

They weren't informed that their day-to-day reality was a fabrication, so they couldn't consent to it. They couldn't decide the nature of the simulation either. They couldn't decide what happened to their real bodies, or to have real biological offspring. Deja Vu was explained in-universe as the program being retroactively changed and everyone's memory being altered, which suggests the machines were tampering with the most intimate corners of the human mind. At any time the machines could wipe them all out if it found some more convenient way to produce electricity. If they were lucky, that wouldn't happen until long after they were dead. But there were no guarantees, and sooner or later it would happen to their descendants.