Given the link between belief and action, it is clear that we can no more tolerate a diversity of religious beliefs than a diversity of beliefs about epidemiology and basic hygiene. There are still a number of cultures in which the germ theory of disease has yet to put in an appearance, where people suffer from a debilitating ignorance on most matters relevant to their physical health. Do we "tolerate" these beliefs? Not if they put our own health in jeopardy.