I very much appreciate your continued interest in the disappearance of villages like Diamantheim and it is fantastic that you met this contact who then referred you onward into the Russian Academy of Sciences. The Russian destruction of these villages makes the most sense to me, also. This is another clue that fills in the missing pieces for my family's past.
I assume the Mennonite is "the son-in-law of the lady" who went back to visit.
I will pass this along to Bernd.
Again, I really appreciate the message and your astute fact-finding.
Best to you,