They show soviets how they should, but sadly some countries have problem with truth and with accepting the history...
It's company of heroes, not company of war criminals.
Showing Soviets as a heroes fighting for their country could lead to showing Nazi fighting to protect their own country (or rather territory) from the "communist plague".
It's a history.
You know there were multiple german campaigns in vCoH? Surprisingly they didn't include any massacres and atrocities, gee I wonder why.