I disagree with the point about giving up certitudes. Really there are two sorts of religious sects. 1. Politically useful sects which demand followers and eve

I disagree with the point about giving up certitudes. Really there are two sorts of religious sects. 1. Politically useful sects which demand followers and everyone else accept certitudes based on pure authority. 2. Politically useless to troublesome sects that don't. The overton window is set such that the second group can't be acknowledged.