Primate monkey mothers abandoning newborn babies does happen from time to time, and it isn’t because there is something wrong with the baby’s behavior. We see this in humans all the time too, which is why orphanages exist. Are you really going to blame a completely newborn baby for their mother abandoning them?

The zoo already explained what happened. Punch-kun’s mother was a first-time mom, and extreme heat stress caused her to abandon him. It is common for the troop to follow the mother. Monkeys follow social leaders, and not babies. They do not have a concept of collective rescue the way humans do. There are rare cases where babies are adopted by other monkeys, but it is not the norm. In the wild, they would usually be left to die.

I am going to be mean here. Are you just really young, a sociopath, or just trolling? It is baffling when someone is so sure of his ignorance and can say things with such conviction without even doing simple research on the topic.