It's more like making a mech out of a mutant zombie corpse to fight off other mutant zombie corpses. If we gonna vilify Nuparu for anything, make it creating the Vakhi
Nuparu did nothing wrong. He had no idea the of the Bohrok's nature. Nobody knew truly for years to come. And as for the Vahki thing, he was merely the builder. He didn't know Makuta was gonna use them for his horrible plans. You don't blame the maker of a weapon for it being used by an evil man.
Problem: Nuparu built Boxors from metal parts only (Krana was the only fleshy part of Bohrok) and he did it in order of saving thousands of innocent Matorans. Also krana were created by Bahrag
While it is a grotesque thought. We need to remember these factions. *Whatever those bohrok were are long gone and their conditions are irreversible. *It was necessary while mata nui was becoming heck in a hamster ball. Toa, turaga, even matoran were becoming infected by krana and there wasn't a soul brave enough to utilize the raw grit to act. Nuparu was a butcher, yes. But it's because of that instinct is what tilted the scales in the favor of the good side and gave the toa a chance to finish their quest to unlock the exo suits. And I think he knew that morality had to be set aside to survive.
Thats kinda stupid, since the bohroks are made of metal and not flesh, the krana is the only part alive, and he didnt know what the bohrok actually were. Also, he did it to stop bohroks from committing genocide on the matorans
Bohrok are fully mechanical besides the krana, and while Av-matoran can turn into Bohrok at the end of their life there is nothing left of them when this happens
Bohrok retcon makes no sense. What are the bahrag then? Former toas of light that got transformed? Leave it at they were created to clean the exterior of the GSR to prepare for Mata Nui’s awakening.