For every story like this, how many Russians endured even worse from the invading Germans?
War is Hell, don't start them.
I do not think the 13 year-old girl who was gang-raped and committed suicide before a second gang-raping had anything to do with starting WW2. For that matter, the Russians did, as they partitioned Poland in partnership with Nazi Germany in 1939. The USSR never restored the territory it took from Poland:

I was going to point out the old saying that two wrongs don't make a right, but Russia's partnership with Hitler was a third wrong. And that's where it stops, three wrongs just make three wrongs. Somehow the French divisions who served with American and British armies in the west don't seem to have gone on killing-raping sprees when they went through Swabia and Bavaria.
For me personally, between the Nazis and the Soviets, it's "a pox o' both your houses". My Dad was 4-F but his brother Erwin served in the US Army in North Africa and Italy. OTOH, their Mother lost several brothers who had not left Russia when she and her husband did and ceased responding to letters in the late 1920s.