And the Arab nations in 1948, following the civil war of 1947.
Unfortunately, self-serving ME regimes - and now well-meaning Westerners - keep telling the Palestinians that none of it is their fault, that they are entirely the victims, and that 'justice' should prevail in them eventually getting the whole of the area 'from the river to the sea' entirely for themselves.
If Germany had had rich countries telling them that they were the victims in 1945, and offering them weapons, they might have acted differently.
Whose descendants are better off now? The Germans (who had 12 million civilians displaced and 1 million deaths during the civilian population flight after WWII). Or the Palestinians, (who had 700,000 displaced at the same time - roughly the same number of Jews being displaced from other ME countries - so a fairly symmetrical displacement, unlike Germany).
History as well as current understanding tells us that the best future for the Palestinians would be for their leaders and fighters to turn away from terrorism.