Not sure if the dna research done on the ashkenazi jews jives with your beliefs on this. But perhaps it does. I would think the middle eastern dna found in this group which covers 80 percent of all jews, would be evidence they came from the middle east and interbred. And then the evidence in the dna that 20 thousand years ago, this same line branched off from the other people in the middle east. So two ties to the middle east and then mixing this in with non middle eastern people. Looks like the jews moved out and into eastern europe. And looks like some non jews converted. A rare thing indeed.