I could work up a theory that certain elements in the Kremlin want their empire back and they expect Puttie to deliver.

How about they have run the numbers and have figured out Russia is a dying enterprise? Conquer and loot or die.

A lot of Russians learn American in school and that gives them (esp the ladies) an opening to a better life. Mike is a prime example of that. He has to be careful. Too much exposure to us Americans (by birth or in spirit) and he may loose his faith. An occupational hazard.