There's a few reasons why most of the Arab world gave up on trying to destroy Israel, and the full blown niggerish behaviour of the Palestinians was a definite factor. While I'm not an expert, I am very familiar with the history of the region and this conflict in particular, and since this shit started in 1947 the Palestinians have treated their Arab allies with nothing short of open contempt and hostility.
Just one example is Jordan, which opened it's borders to millions of Palestianian refugees after the first Arab-Israeli War, it housed them, fed them, employed them, and they thanked their literal saviours by;
- Using their citizens as meat-shields against IDF retaliations to PLO raids
- Assassinating King Abdullah I in 1951
- Attempting to seize control over the entire country during the Black September coup in 1970/71.
And that was just in one country, which after they found themselves expelled from they immediately went and started shit to various degrees in Syria, Egypt, Lebanon, and Tunisia. Basically, if you ever took in Palestinians at any point and you didn't do exactly what they wanted you to do regarding Israel 100% of the time, they'd chimp the fuck out and start killing people in the street. Jews might be No.1 on every Arabs 'to genocide' list, but you can bet Palestinians are right behind them at No.2.