First, there is no such thing as a Palestinian - that’s a made up identity to falsely claim the region as their own. Second, there have been five two-state solution offers in the past, that Israel was ready to accept. Leaders on the other side refused. Third, Hamas is not accepting the current deal that is on the table, and is incredibly fair (given the lopsided hostage/prisoner release that favors Hamas). Fourth, Israel had already withdrawn from Gaza - that was the status quo when Hamas got elected and began a decades long campaign of terrorism - remember the literal thousands of rocket attacks on Israel? Fifth, if Israel’s goal is the “annihilation of Palestinians”, why are the 20% of Israel’s population that would identify as such doing so well? Clearly this isn’t their goal, but just misinformation.
A quote from the Minutes of the Ninth Session of the League of Nations, 1922:
Colonel Symes explained that the country was described as "Palestine" by Europeans and as "Falestin" by the Arabs. The Hebrew name for the country was the designation "Land of Israel", and the Government, to meet Jewish wishes, had agreed that the word "Palestine" in Hebrew characters should be followed in all official documents by the initials which stood for that designation.
Hamas just underestimated how much it would actually cost. Or maybe they didn’t, who knows.