Out of the three major blocks. The allies (not counting the Soviets) were by far the most humane. Even though they did quite some fucked up shit. It was nowhere near the scale of the Axis and the Soviet.

Lets not forget the soviets literally started the war with a Nazi alliance and invaded Poland and Finland for territory. They also committed great atrocities towards the polish population.

However. The allies were still coloinial powers who bombed civilians as a war tactic. They were far from “heavenly”.