I would have to see this particular work.
The DNA comes from Levant-Mesopotamia > Rome > European Ports > European Trade Centers > Interior Europe.
I’m not sure where you’re getting Rhineland from.
If you look at levantine DNA it’s comprised of Arab Mesopotamian, Some Anatolian, Some Caucasian and even some Persian. But they’re 30% or so just founder population.
If you look at ashekanzi DNA it’s european(female) -levantine(male) with some oddities due to bottlenecking and inbreeding.
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