People have been making up things all through history. But when it comes to lying and twisting reality and facts, the so called "Palestinian" narrative is a true piece of art.
Let's start with the bare facts: "Palestine" Doesn't Exist. Israel is the homeland of the Jewish people, as described in the Bible. Whoever doesn't acknowledge that has a serious problem with Biblical text, Archaeological excavations, Historical facts and with over 2,000 years old narrative of the Jewish people.
Being in Exile for 2,000 years, the Jewish people came back home in 1948, and mistakably thought that the locals that happened to live here would show support and understanding in face of this miracle. But things turned out to be more like Parable of the Wicked Husbandmen described in the New Testament.
The locals sought taking advantage of the human memory being albeit short at some instances, and thought they could benefit from making up a Arab nation that never existed, and call it by a Latin name none the less - "Palestine". Combine that with the innate tendency of Arab culture to approve of Lying If It Serves Your Purpose, and you get the made up "Palestinians".
Where have they been before 1948? what proof of being a nation do they have? nothing. If else, their deeds prove that they are direct descendants of the Amalekites, and thus need to be annihilated according to the Holy Bible.