You seem to be using a lot of regurgitated talking points so I’m going to break this down very simply.

It does not matter if Palestinians did not have a national identity before the 1800s. Modern nationalism is a new concept in the Middle East. What matters is that there were people there in that area that were kicked out of their homes by the nationalist movement for a Jewish ethnostate called Zionism. The region, as you alluded to, had a wide array of ethnic and religious backgrounds all living in harmony. Jews and Christians and Muslims were neighbors and brothers.

The UN, a bunch of white colonizing nations who were not from the region, decided that 57% of that land would be taken away from the population that was living there. The indigenous people. They revolted. In the ensuing ethnic cleaning, zionists siezed 78% of that land. The indigenous population went from ~1.3 million in 1947 to ~150,000 in 1948.

It doesn’t matter who lived on that land 2000, 3000, however many years ago. You cannot go to someone’s home and say my ancestors lived here 3000 years ago so I’m taking it back now. If that was the case for even 400 years ago, America wouldn’t be a country.

The modern state of Israel militarily occupies the West Bank and Gaza and continually kicks Palestinians out of their homes in East Jerusalem and the West Bank. They are about to annex the West Bank. They armed and funded Islamic terrorists in order to create a rift in the Palestinian population and pull support away from the primary Palestinian political party. Now, they collectively punish all Palestinians living in Gaza with a blockade that controls water, electricity, construction materials, access to their air and sea space, natural resources, etc. 57% of Gaza children are anemic and 90% of the water is unsafe to drink. You’re quick to brush this off as a failed gamble, but it is a cold and calculated move. They even calculated the caloric intake required to keep people on the brink of starvation but wouldn’t die. “The idea is to put the Palestinians on a diet, but not to make them die of hunger.”

Israel is not even a nation of its citizens. It is, by law, a Jewish nation. The Jewish nation state law declares the right to self-determination in Israel/Palestine “is unique to the Jewish people,” and the “state views the development of Jewish settlement as a national value and will act to encourage and promote its establishment and consolidation,” effectively encouraging racial segregation in housing.

Former Israeli prime ministers Ehud Barak and Ehud Olmert have both warned that a continuation of the occupation will lead to Israel becoming an "apartheid" state. Barak stated: "As long as in this territory west of the Jordan river there is only one political entity called Israel it is going to be either non-Jewish, or non-democratic… If this bloc of millions of Palestinians cannot vote, that will be an apartheid state."

There are more than 50 laws that discriminate against Palestinian citizens of Israel. directly or indirectly, based solely on their ethnicity, rendering them second or third class citizens in their own homeland.

Archbishop Desmond Tutu and Nelson Mandela, heroes of the struggle against apartheid in South Africa, have both compared Israel's treatment of Palestinians to apartheid.

These are not actions that the good guy takes. Fascism and apartheid have always been inevitable for Israel, and maybe this new government of theirs will convince you of that. But honestly, I doubt it.