The only thing that would have changed if the Allies agreed to a truce ( which was simply not possible IMO ) was that Stalin would have had all of Germany and Austria for himself.

Nothing short of complete destruction of Germany was acceptable to Stalin and the Soviet people who have suffered so much.

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The war against Russia will be such that it cannot be conducted in a knightly fashion. This struggle is one of ideologies and racial differences and will have to be conducted with unprecedented, unmerciful and unrelenting harshness. -Adolf Hitler