Some Years ago, the United Nations published a lengthy and thoroughly documented report on "The Origins and Evolution of the Palestine Problem."
And Here is part II.
The report is frankly one sided: relentlessly pro-Palestinian & anti-Israeli.
But it can't just be dismissed. In fact, it presents the strongest case for the Palestinian cause that I've yet come across, in my internet travels. So it's something that partisans of Israel, like me, need to read and digest.
We should consider it a sort of "trial by fire."