It does not get more ignorant than that! There were always people living in the geographical area. Jesus for example was both a Jew, in terms of his religious identity (involving law), and also a Judean, in terms of his location: he lived in the land of Judea, which was a land that comprised regions stretching from Idumaea in the south to Galilee in the north.
The words “Palestine” or “Filastin” do not appear in the Koran. “Palestine” is also not mentioned in the Old or New Testament. It does occur at least eight times in eight verses of the Hebrew concordance of the King James Bible.
The Philistines were an Aegean people – more closely related to the Greeks and with no connection ethnically, linguistically, or historically with Arabia – who conquered the Mediterranean coastal plain that is now Israel and Gaza