I don't understand why is this surprising. Has there ever been any group of primates/hominids where deviating behavior isn't frowned upon? Every group prizes s

I don't understand why is this surprising. Has there ever been any group of primates/hominids where deviating behavior isn't frowned upon? Every group prizes social cohesion. When a behavior looks threatening to that cohesion it is a natural defense for the group to isolate such threat. It is a necessary part of its survival, like an organism reacting to parasites, infections or offending threats. This reaction even has respectable philosophical ethical justifications, see Karl Popper's discussion on the limits of tolerance. I do not condone with intolerance, but we should understand that, at a very primary instinctive level, there are evolutionary and biological reasons for this. These are even some of the reasons for the downvotes I will get.