I don't see how this applies to Morroccan immigrants or even the occasional individual Morroccan refugee seeking asylum for some particular reason.
You have made your case very persuasively, AW, and it is a thing to be admired on that count alone, whether or not the writer Wright has stretched the meaning of "diasphora" to the point of misuse (as you suggest).
I haven't read Wright's article so I took his usage at face value. I assumed that he was talking about a community of persecuted Morroccans who have left the country on that account as a matter of choice, rather than involuntarily in the case of refugees.
Which raises another question. Where do you draw the line between "refugees" and "diasphora"?
Many, if not most, of the Jews who escaped Hitler's Germany and the Nazi occupation in Europe were quite literally running for their lives, not unlike refugees.
