There is no such thing as a Jewish_Diaspora. This was disinformation designed to make everyone think White European Jews are the ancient Israelites/Hebrews and Jews around the world were not converted at some time in the past (but they were as Judaism was a very proselytizing religion in first millenium AD. Israel the northern region of what today is Israel but was wiped out around 700 years BC; they fled to the southern region, what was called Judea. Palestine . Abraham and his early descendants were not even from this area. They would not marry the locals.
I’m not really sure what the big deal is that these people want to be the ancient Hebrews so badly? They were terrible people back then (as many of them are today), where they were called by their local god named Yahweh to mass murder their neighbors. Hebrew Scribes (the leaders of the time) wrote themselves in as Gods Chosen as a means to compete politically with the Monotheists of Persia and other areas.
Schlomo Sand has written some excellent books on the history of this area. “The Invention of the Land of Israel”. Of course, there are People/historians who write books stating the links of Euro White Jews to this area is legitimate BUT THERE IS nothing or little on Diaspora because nobody can prove this (I hate calling them Jews because so many of them are atheists etc, and Jew is not a race – If a person stops being a Catholic they certainly stop calling themself one!).
So, we have Black Jews, white jews, jews from Yemen, Asian jews. Obviously Jew denotes a follower of Judaism, Not a race.