The Romans renamed Judea "Palestine" after the Palestinian people, known in Biblical times as Philistines. Archaeologists believe that the Philistines were refugees from Mycenean Greece around 400 BCE.
Closely related to Jews, Palestinians represent "descendants of a core population that lived in the area since prehistoric times."[17] Since the time of the Muslim conquests in the 7th century, Palestinians have been predominantly Muslim by religious affiliation and linguistically and culturally Arab.[13] Most Palestinians are Sunni Muslims, but there is a significant Palestinian Christian minority of various Christian denominations, as well as Druze Palestinians and a small Samaritan community. Palestinian Jews made up part of the population of Palestine prior to the creation of the State of Israel, but very few identify as "Palestinian" today. The vernacular of Palestinians, irrespective of religion, is the Palestinian dialect of Arabic. For those who are Arab citizens of Israel, many are bilingual and fluent in Modern Hebrew. Those in the diaspora speak the languages of their host countries in addition to Arabic or to its exclusion.
Not all Jews are descendants of the Hebrews, either. Many Russian and Polish Jews are descendants of the Khazars, a Turkic people who converted to Judaism aroiunf 800 AD.
There are people who believe themselves to be Palestinians, no matter what some right wing Orthodox clowns claim, just as the descendants of the Khazars consider themselves to be Jews.
What you are quoting here is a right wing bunch of crap that most Jews themselves do not believe. Spew it elsewhere, no one sane believes this.
There were Palestinians Arabs in Israel before the Zionists came, and they were driven out by the Israeli Army. Ohters left at the instructions of the various Arab countries, who said there would be a 'free fire" zone established,and they let to avoid be caught in a battle. Then they were prevented from returning home.