There are other racist tyrants currently murdering innocent people across the globe, and you should be able to name them today, instead of relying on the WW2 trope to justify current atrocities.
What WE did to places such as Baghdad and Mosul and Raqqa and Damascus and Tripoli and Yemen in the last 10-20 years - well, those piles of burning rubble are still smouldering. What we are doing TODAY in Yemen, for example, is far more important than what happened to your grandparents.
Russia has nowhere near the amount of innocent blood on its hands that WE, civilian members of the criminal 5-eyes superstate, do. If you want to do something about peace in the world, prosecute the war criminals in your own society. They're still committing crimes, and we - the people - will have to pay for them anyway.
The real target of your ire should be the very real, currently still active war criminals in your own cabinet/parliament/congress.
Prosecute YOUR war criminals before it is too late.