Ours as in belonging to the People of Israel, aka Hebrews, Israelites, Jews.
Jesus was not a Palestinian, he was a Jew. There were no people called Palestinians until the 20th century. The term applies to those Arabs who live in the West Bank and Gaza. Jesus was not an Arab -- arabs did not exist in his day.
The term for the Land in Jesus day was not Palestine, but was Judaea, Samaria, and Galilee.
Again, your ulterior motive of delegitimizing Israel is sooooo darn obvious.
Arabia did exist in the 1st century, Roman historians record Arabia and Arab. Palestine is the word that encompasses the region as a whole, although the meaning of Palestine is ἡ πάραλος γῆ the coast-land.
Palestinians on the other hand, are mostly of a West-Semitic stock, closely related to Syrians and Lebanese and DNA tests have proven they Phoenician blood, who are the indigenous people of the region. The blood of those people in the Bible flow through the Palestinians.