While that may be true, I have a hard time believing that if it came down to brass tacks the Arab states would do anything other than support the Palis against whomever they were in conflict with. Too strong of a group-victim identity for them to do much else, other than sit things out.
I understand the no-love-lost relationship. The Jordanians gave the Palis the boot a few decades back and there has been bad blood ever since between them. Likewise the Saudis, albeit for different reasons, would rather not get stuck on the tar baby of Pali statehood. As I recall, the Shah, when he was in power, also expressed some concern about the idea of a Palestinian state.
They support the giving of Israel to the Palestinians for the simple reason that they do not want the Palestinians in their lands. They also don't want the Palestinians to be allied with the Jews, and that is why they do everything they can to keep the Palestinians and Jews enemies.
Palestinians allied with Israelis? You know, that is a picture that I have never considered, and have a hard time visualizing under almost all credible scenarios. Although, I'll admit, it is an intriguing gambit. It's just hard to imagine any (credible) circumstances that would bring that about.
I see Hitler in the UN, not in the Palestinian ranks.
Again, that is a hard one to visualize. Hitler was a man of action. He had (perverted) ideas and he acted, albeit with ruthlessness and for a diabolical purpose. The UN today is far too ineffectual for action. I can't think of many cases where they have acted with decisiveness since the Korean conflict. The UN of today is hobbled by scandal and maladministration, which has made it a toothless tiger, all symbolism and no action. They are basically an ego-inflated debating society. The damage the UN does today is largely a result of ineffectiveness and obstructionism, as well as scandal and draining of productive resources from dues-paying nations. In terms of addressing real problems, it is largely irrelevant.