That’s an excellent point.
Then after this period, in 1650, there were enough Ashkenazis around for the Chmielnicki (sp?) revolt to kill at minimum tens of thousands of them.
The line bottle necked to about 350 and then...
Does anyone know the rate of Ashkenazi Jews marriage to non-Ashkenazi (in the United States). I imagine its pretty high and would tend to dilute the genetic issues rather quickly. Although there is a huge upside to not diluting it too considering the brain power.