Antivaccine “studies” never die. They always return to promote disease among children.

Antivaccine “studies” never die. They always return to promote disease among children.
Antivaccine activists have been targeting the community of Somali immigrants in Minnesota for over a decade now, with devastating results. In the midst of a growing measles outbreak, antivaxers have descended upon the community to keep promoting antivaccine quackery.
Yet another population is learning why you shouldn’t trust Andrew Wakefield. There is a large Somali immigrant population in Minnesota, and unfortunately they’ve been targeted by antivaxers. As a result, their MMR uptake has plummeted, and now they’re in the midst of another measles outbreak. Andrew Wakefield screws yet another group.
Orac contemplates a reason why doctors become antivaccine that he missed the last time he discussed this topic.
Even though they should know better based on their training, too many physicians embrace the dark side and become antivaccine. How does this happen? What personality traits common among physicians can facilitate a descent into pseudoscience?