"Many local Jews converted to Islam and were assimilated among the Arab conquerors. Sand concludes that these converts are the ancestors of the contemporary Palestinians."
Thesis 1: the Jews are really Palestinians.
Thesis 2: the Palestinians are really Jews.
Conclusion: none.
It has no bearing on the UNESCO bullshi'ite, which is that the historic sites of the Holy Land shall henceforth be listed only by their Arabic names and considered only as constituting the Arab cultural heritage. It also has no real bearing on current boundary, building and zoning disputes. These are not determined by a genetic claim on land tenure.
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“...Sand argues that it is likely that the ancestry of most contemporary Jews stems mainly from outside the Land of Israel and that a “nation-race” of Jews with a common origin never existed, and that just as most Christians and Muslims are the progeny of converted people, not of the first Christians and Muslims, Jews are also descended from converts. According to Sand, Judaism was originally, like its two cousins, a proselytising religion, and mass conversions to Judaism occurred among the Khazars in the Caucasus, Berber tribes in North Africa, and in the Himyarite Kingdom of the Arabian Peninsula...”
https://en.wikipedia.org/wiki/The_Invention_of_the_Jewish_People
“It also has no real bearing on current boundary, building and zoning disputes. These are not determined by a genetic claim on land tenure.”
On what other basis should such determinations be made? If genetics and descent are excluded from the question, then what are we talking about?