He has a right to his opinion. He does not have a right to talk to other shareholders the way he does when they have a different opinion than his. Calling them stupid etc. Both in public posts and personal messages to them is not fair to them. I have copies of several where he did both in public and worse ones he PM'd to them.
If he wants to talk to other shareholders that way he can do it on IHUB. Personal attacks will not be allowed here.