I think the only way for the Palestinian side to win is if the war spirals out of control and begins to involve more states in the Middle East, unfortunately. I don't think the west will stop providing weapons soon enough to stop the genocide by their own. The USA, Germany, and France are the chief suppliers of munitions, they would have to all stop.

Something in the Middle East needs to happen to upset the current diplomatic order. Iran needs to be more involved, and so does Iraq and Jordan or Syria. It's possible that Israel might mess with countries like Egypt or Syria more in a fascistic fury and it could lead to the right combination of events leading to Palestinian victory. At least Palestine has Yemen. But this all looks very bleak