Re-read this article. It claims that 15,000 emails were sent to the Rally Organizers that caused Palin to be dis-invited. This may have occurred, but it was the other threats and back room maneuvering that actually forced this crisis.
either way, I did not read the article closely because IMO the writer was gloating, and with the affection for Sarah Palin among Conservatives, this could turn really ugly dalight.
For me, the writers point was to stir divisions in Moral people, that is what he was aiming for and he may have hit the target.