We've debated it over and over and over again. In my opinion it's an ongoing feud based on monotheism, mixed with racism and added to this notion of a "Holy Land" - this is the end result of a bunch of bad ideologies taken to the extreme.
The Palestinians wanted the immigrant non-Palestinians to be citizens of
their state [see King Crane Commission Report 1909], but the non-Palestinians, leaders of whom were all mostly
atheist, wanted a non-Palestinian state, based NOT on their religious laws, but strangely, mostly European and Ottoman laws. In fact, the criteria under which non-Palestinianss are permitted to "return" to occupied Palestine, are not by religious definitions [except when the "returnee" is a non-Palestinian convert to another religion]
Note that non-Palestinians have lived in Jerusalem ever since the Muslims recaptured it from the crusaders, the ONLY period when non-Palestinians were BANNED in Jerusalmem being under Crusader rule, although even this is now being considered as a false interpretation of the history/
So which part of it is the monotheism? Which one the bad ideology?
Meanwhile, the Palestinian demand is for a state of equal rights for all its citizens with rights for those who were kicked out in 1948,
as they have always been, and the non-Palestinians want a state of the non-Palestinians and want the Palestinians to
recognise that its a state of the non-Palestinians.
Note that even today, while being asked to be satisfied with 20% of their historic homeland [real, not mythological], the Palestinians are
still willing to give equal rights and citizenship to those non-Palestinians who are already living there while the
non-Palestinians support evicting the Palestinians who have not yet been removed from the occupied territories and are meanwhile treated as second class citizens. Guess which one is the only democracy in the Middle East supported with funds weapons and recognition by western secular nations that bark regularly about human rights
So which one is the monotheism, which one the bad ideology?