There was a UN plan to partition the land, which the future state of Israel accepted. It was rejected by the Palestinians, as you call them. They were told by their Muslim neighbours they could take the land back once they had expelled the Jews. I'll leave you to ponder exactly what that meant.
What is the phrase "the Palestinians, as you call them", meant to mean? What do you call the Palestinians? It was the Palestinians land- Why would they agree to a plan to take their land and give it to the armed Jewish/Zionist terrorists that were burning their villages and massacring them?