Palestinism? It is the belief that the Palestinian Arabs were unfairly victimized, dispossessed, colonized, raped, punished, expelled, murdered, degraded, castrated, etc. by the Zionist Jews who created the State of Israel, which continues to do all these things to them. Palestinism holds that this is the single greatest injustice in the world today, and only the replacement of the world’s only Jewish state by an Arab state can rectify it.
I use a parallell term, Palestinianism, since at least 2011.
Palestinianism is that ideology which promotes a nationalist myth that there is an Arab Palestinian nation. It is different from all other Arabs.
That they have resided in the area of Palestine for 5000 years.
That Palestine was never a Jewish homeland.
That, for example, the Temple never existed. And if it did, it was not erected in Jerusalem.
And on and on.
^