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.

Yeah that's a good question. A diaspora seems to me to describe the movement of a people on a massive scale (the African diaspora), or it can apply to individuals who are part of that movement (including those descended from the translocated individuals). There are ways that diaspora and refugee intersect and ways that they don't. An African slave forcibly shipped overseas is clearly not a refugee, although later they might seek asylum in a free state and become a refugee from slavery.