In my opinion, the war left Arab war refugees that the other Arab countries kept trapped as a thorn in the side of Israel. After the war, Israel did everything it could to protect and provide safe harbor for Jewish refugees in Arab countries. The aggressors of that war should still be made to pay.
There are any number of scholarly works that refure this simplistic view. No frontline Arab country "trapped" Palestinians. To the contrary, they wanted them either back in Palestine or dispersed. Many took the latter route; may did not. Two civil wars broke out as a result of refugee concentrations. One was in Jordan in 1970; the next was in Lebanon in 1975.

Historically, that territory was Jewish land before it became Palestine. Theoretically, there is no Palestine and there are no Palestinians. However, there is the original modern day Israel and what the Arab lost as a result of the war that Israel has every right to maintaining as she wish. The Gaza Strip, Golan Heights, and the West Bank shouldn't exist at all with Arab interests.
If by you mean King Saul and David, there were people there when the Israelites conquered the area. The "no Palestinians" is a long term Zionist propaganda tool that was in play decades before Israel became a country. At ome stage, the Zionist movement claimed there were no people living in the region.

Neither side wears a white hat in this struggle. To state the the US has left Israel twsting in the wind is absurd.

Regards,

Tom