Confusing the KGB with the NKVD (different names used at different times for essentially the same organization) is a totally inconsequential mistake and it is disingenuous to pretend it has any significance.
You kind of make my point because any one of the things complained of could be said to be inconsequential but the sum total strongly suggests more fiction than fact.
"Enemy at the gates" comes to mind. That whole "pick up the gun of your dead comrade" scene..
