"Ancient Roman times, referring to the ancient people called Phillistines by the Greeks and Pelset by the Ancient Egyptians. The idea that there is no such thing as a Palestinian,"

The 'palestinians' are not the Phillistines of old. (Although the propaganda mill will have you believe that) Todays 'palestinians' are the result of the Arab invasions of the 7th century. "palestinians" didn't come into existence, until the Arabs lost their fourth AGGRESSIVE war against Israel, losing the territories they illegally occupied since 1948.
Meanwhile, Jordan sits on 80% of the British Palestine Mandate. Great Britain gave the Arabian penninsula to the House of Saud, and to keep them happy, gave 'palestine' to the hashemites, who were displace by British actions.
Until 1948, 'palestinian' refered to a Jew living in the region...the others there, were generic Arqabs.
After the creation of Israel, Arabs from the various 22 Arab nations flocked to the region for jobs INSIDE Israel.