The form of Christianity that I'm acquainted with, precludes one from giving allegiance to any over and above God himself, ==
Russian Ortodox Church is called Russian not by coincendence. She prays on Russian language. Her cannonized saints are Russian historical figures and much more. Russian ortodox beliver are teached by Church how to be Russian and cristian.
Russian Ortodox believer has to ally himself to Russianry and Russian state.
That is why the Bolshevicks when took power attacked Church in first since they perfectly knew that Church is thier moral ideological enemy. Notice Bolshevicks didn't attack with such force neither Mosks nor Synagogues since they weren't such danger for them.
Hence I cann't imagine how the follower of other faith may become real Russian.
Do you recall when the KGB controlled the Russian Orthodox church? What has really changed in 2006?