If the pledge of allegiance were made to a person who is not from Quraysh, would this pledge be considered legitimate?

The Shaykh : If they pledged allegiance on the basis that he is the Caliph of the Muslims, then this is a sin twice over. And if they pledged allegiance to him as the king of the land, this is one error, one error, because there is no pledge of allegiance to the Caliph of the Muslims either. It is an error twice over: he is not the Caliph of the Muslims, and yet they pledged allegiance to him as the Caliph of the Muslims.