I can suggest some items, like if Stevenson has done studies, UVA, that suggest people reincarnate in different religion; you can find articles and papers he wrote through google search. Delores Cannon in her book past life was more direct, if you as a Hindu hate on Islamic folks, your next life you were more likely to be born Islamic. Same for Christians being born into non Christian faiths. Journey of Souls, Michael Newton; I think you will find reading that book will lend a great deal of weight to that assertion. If we live thousands of lives and can track back to times before our present day, organized religions, then it seems like a reasonable conclusion that no system of belief, whether that comes from culture, nation, or religion held absolutes. That is not to say there is not an underlying truth, like advocating for kindness and forgiveness- that seems to be a standard that is shared by most.

Also, you may enjoy PMH Atwater's book, "The Big Book of the Afterlife," which has the highest number of studies referenced, and people from all faiths have experienced afterlife experiences with archetypes from their faiths.