Please try to follow the conversation. I was addressing the claim that shunning certain beliefs would cause society to collapse, and I've clearly demonstrated that to be false. Not sure how what you've ranted about here ties into that.
In an individualist perspective, I agree with you, shunning won't cause society to collapse.
But when people advocating it to an aggressive level-extensively campaigning the rejection of a certain person at social scale, this is dangerous and smells like politics, and was exactly the way how hitler shunned the jews.
I think you're having difficulty distinguishing the concepts of "shunning" and "genocide."
Seems you are so inclined to acknowledge what nazi had done before the 'genocide', or you simply don't know what had really happened.
P.S. the nazi party was a frequent practitioner of this shunning policy.