They better lay the blame on Hitler and Stalin equally.
They started the war, were initially partners, and both need to be given equal recognition for the magnitude of evil and havoc they unleashed upon humanity. The scars of which we bear to this day.
And America better get due credit for its sacrifices and for holding the moral high ground despite our temporary alliance with the Soviet Union.
So far, the material has been unflinching as far as Soviet and German motivations. The "Between 2 Wars" series is equally good in that respect, discussing in detail the level of Soviet influence in Germany during the Weimar era.