if they had shown up and signed the agreement. No blood. No money. Just the indicated territory free and clear. They turned it down flat.
The JEWS had already agreed to it. The Palestinian Arabs rejected it, and started a war immediately. (Actually violence had been underway for years, but the Pals shifted into high gear.)

Source: https://en.wikipedia.org/wiki/United_Nations_Partition_Plan_for_Palestine
The Plan was accepted by the Jewish Agency for Palestine, despite its perceived limitations.[5][6] Arab leaders and governments rejected it[7] and indicated an unwillingness to accept any form of territorial division,[8] arguing that it violated the principles of national self-determination in the UN Charter which granted people the right to decide their own destiny.
Instead, they started a huge war in which SEVEN Arab States attacked Jewish area. At the end of the war, they ended up with THIS area marked as Judea, Samaria, & Gaza.

Still too goddamned stupid to quit when they were ahead, they goaded neighboring Arab states to try again in 1967. The Arab states, led by the idiot, Nasser, complied. Then they end up with the current situation. Whose fault was it?
DFM