What do Humanists think of the religions of the world?
That varies from Humanist to Humanist. Some Humanists, having been persecuted for their convictions, or seeing in religion a propensity to superstition, have an active dislike of all forms of religiosity. Some are quite religious, though in a very questioning, seeking way. Others are somewhere in between, seeing religion as mixed blessing, offering some valuable guidance and insight, but at the same time cultivating a subservient attitude of submission to authority, an unquestioning acceptance of dogmas, and a refusal to abandon medieval, spirit-haunted views of the world long since proven false, at least in anything resembling their original form.