Ebook: Rethinking "Gnosticism"

i agreed with all his notions that gnosticism is such a wide category that cannot be pinned down to one set of characteristics, however his notion that it should all be changed to 'biblical demiurgical traditions' is also wrong. Changing the name of the category will not change the fact that all the old misconceptions will also come along with it. also if he perceive 'gnosticism' to really mean heretical, then whats the problem with using this term?