Comparisons to Poland are idiotic since Poland was an actual country while palestine was nothing more than the name of a region, the same way the Midwest is a region in the US. Are Midwesterners an ethnic group who should be given their own country?
Palestine was part of the Ottoman Empire and then later Jordan, just like California is part of the USA or The Negev is part of Israel. These regions don't lack rights just because they are part of different polities. Most of Asia and Africa were part of empires for thousands of years until decolonization when European style nation states became popular. Being an independent nation state doesn't give you special rights over people from other types of polities. Palestinian Arabs have equal rights to Jews, as much as that must pain you to hear.
If the Midwest wants to be independent then it can be independent. It's not up to China to decide the fate of the midwest. Jordan and Palestine decided to slip into two states in 1988. Deal with it. That's their business, it's not up to you. Palestine is as legitimate of a nation as any other.
Jordan was never the recognized sovereign of the land. When the british mandate ended, they went to war and took it but no one recognized that as a legitimate act.
It was de Jure Palestinian and de facto Jordanian. No matter what perspective you take there is no case for Israeli expansionism in Palestine.
?When Jordan decided to enter the fray in the Six Day War, Israel managed to push the Jordanian military forces out of Judea and Samaria. If Jordan's occupation made the land a valid part of Jordan, than Israel's occupation makes it a valid part of Israel. You can't have it both ways.
If Israel wanted to incorporate the Palestinian people into Israel then there is a case for that. Two polities would become one. There is precedent for such things. Israel does not want to do that and has always said that the Arabs of Palestine can never have any human rights or citizenship under Israeli control. That has always been and continues to be the official Israeli position. Literally apartheid. That's the fundamental crime if the Israeli occupation.