Personally, I would take anything taught in a religious school about another religion - especially one regarded as heretic! - with a cellar full of salt. (I don't like the idea of religions running schools apart from their own Sunday Schools or equivalent - worst are these Creationists building City Academies in the UK as some people don't realise who they are.) I also don't like the idea of the only path to the Divine being through a priesthood. Sure, have priests (or priestesses) for those who want/need them, but believe they're the only path to heaven and you might as well believe that the cheque's in the post, of course I love you, darling, and I don't fancy your sister at all...... In the area of religion where I am, we don't have heresies. It's rather more pick'n'mix.