Sure the palestinians have the muslim world behind them but then again, Israel has the US behind them (Thankfully due to the US being a developed country, propaganda like that against palestinians isn't nearly as strong but they do still have the power to give billions of aid to Israel). I doubt the muslim countries would stop hating Israel if the US stopped helping Israel but I also doubt that US support for Israel would stop if the muslim countries stopped supporting the palestinians.
I do however think that muslim anti-semitism would eventually wittle away if palestinians managed to obatin a respectable peace with Israel.
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