Yes because the Russians are so utterly incompetent that they have literally no strategy in winter time aside from standing around like chickens with their fucking heads cut off. How do people buy this shit?
They buy it because they have internalized racism, it is simply not possible that these asiatic beasts have prepared for winter.
The nazis themselves were like this, the diaries of their leaders during the first 2-3 weeks of operation barbarossa show how little they thought of the soviet union at the start.