Thanks, irosie91!
your issue up with Ariella Oppenheim, who did the original study. This is her conclusion. I am not a geneticist, so am just reporting what the implications of her findings on the first of the videos. There is also cultural evidence from Tsvi Misinai.
So at any rate, it seems to be a done deal among geneticists that Palestinians are about 85% descended from ancient Jews.