I don't think a version of history where the USSR attacks Nazi Germany unprovoked is one that makes the USSR look "evil".
There is plenty of evidence, and it is not new or western. This claim was made in the 1980s, by Soviet defectors.
Ah, Suvorov. Even bigger liar than Solzhenitsyn.
Make people repeat the same lie 10,000 times and they'll start believing it.