Free Will, Erroneousity, and the Problem With the Backfire Effect

Is this phenomenon common only to conservatives and Christians?

Someone posted a link to a podcast about research which shows that when a strong-yet-erroneous belief is challenged, most people may experience a weakening of your convictions, but most people quickly rebound, reassert their original belief and dig in their heels. Note here that this starts out with an assumption we cannot be certain is true of false. The point of all this seemed to have been to prove why conservatives won't...