In my opinion too. There is only One source of everything, but many cultures, so some religious differences seem to appear. But as humanity progresses through greater education and exposure, I see the more progressive ends of all religions start to blend and the differences becoming unimportant.From your knowledge base; don't you accept that there have been multiple avatars, and if we look into each individual religion, couldn't each be influenced by a different incarnation (Tho each of these stems from the One Source that creates reality)?
In my opinion.