As an aside, unless the outcome of mob mentality is a decision that you'd not otherwise agree with.... the only consequence of it is faster decision making for

As an aside, unless the outcome of mob mentality is a decision that you'd not otherwise agree with.... the only consequence of it is faster decision making for you (member of the mob). But the core of the issue is that we are shunning them, as we have shunned many other groups too closely connected to violent motivations. The only difference between now and then is that this brand of terrorism is homegrown, so the 'suffering' of the white supremacists is more visible to us. One thing to note is that unlike say no-fly lists, no one is targeting individuals, just the organization. These people could dissolve their group, wait one month, and start a new company that no one would ever think to ban. These people could also similarly act as individuals within the system, without any blowback. It's only when they congregate under a clear, acknowledged banner of hate that any penalties come into place.