The following report was written by "The Palestinian Return Center (PRC)" which is an independent, non-partisan, organization.
Even so, as you can read, it admits that Arab countries (here they write about Egypt) discriminate against the same Palestinians they say they "support".
Palestinian refugees have been subjected to a fragile legal and humanitarian status in Egypt, where they are treated as foreigners rather than asylum-seekers fleeing conflict zones.
Palestinian refugees, particularly those who fled war-torn Syria, have been denied the right to legal visas, refugee documents, safe accommodation, basic services, and relief assistance in the Egyptian territories.
Those who illegally entered Egypt via the Sudanese borders have been denied the right to free movement, education, and labor, among other basic necessities.