That map show countries that are united by a single Arab language, a single religion of Islam, and a common history of Arab rule. But those countries have distinct peoples and cultures, some Arab and some not. There are Berbers in the west, Egyptians, Beduins, Iraqis, Yemeni, etc. They are not just simply Arab with no distinctions. The Palestinians are descendants of the local population, not transplants from Arabia. It is dishonest not to recognize their distinct identity.
Ok. “Palestine” used to be a region in Southern
Jordan. They are Jordanian. There is no such thing as “Palestine” or a “Palestinian.”