“If solid, uninterrupted ARAB OCCUPATION for nearly 1,300 years does not make a country “Arab”, what does?”
Here King Abdullah of Jordan admits that Arabs conquered and OCCUPIED Palestine. And the obvious conclusion is that in order to occupy a land, peoples other than Arabs must have been living there before.
Your claim that the Palestinian Arabs who are mainly descended from these Arab conquerors are indigenous is unsupported by historical evidence. By your flawed reasoning Spain should also be an indigenous Arab territory because their armies occupied and colonized it centuries ago.