My favorite genocide story was back in 135 AD during the Second Jewish Uprising when Jews started killing Christians so the Romans sent in 13 legions and killed every last Jew in Judea, burned every Jewish temple, and renamed the place Syria-Palestine because there weren't any Jews left alive there to argue about it.
As for WW2, the Nazis had a fuel shortage, so it was impossible for them to have burned as many bodies as claimed. No sign of deforestation or anything. Simply a logistical impossibility. But we're told it happened, so that must mean that a miracle like the "menorah" happened where Nazis were able to burn bodies without consuming fuel because they were doing God's work.