Define "innocent." If they're the parents, children, relatives and friends of Nazis and soldiers serving the Nazi cause, then they can't be innocent.
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So German children under the age of twelve, mothers and grandmothers and in laws of a stormtrooper, even one drafted against his will, are all accomplices?
I don't think I am going to buy that.
The basic concept up to WWII is that War is Hell and All's fair in love and war. War is a mental disease not of individual humans, but human society in general, and is contagious to other societies.
In what I would call a justifiable attempt to prevent a reoccurrence of such a disease in Germany, easily the most militaristic society of the mechanized age, they had War Crimes Tribunals at the end of WWII, and it seems to have been successful Germans now make nice with everyone, as do the Italians and the Japanese.
Lamentably, the Soviets and the Americans still have a lingering dose of said disease, and the Chinese at least showed symptoms when they overran Tibet.
I am not going to say that warmongering fools like LeMay should have been tried for war crimes, but I think I'd have done something--bust him down to Captain or something--to send a message that excess in the pursuit of victory is no virture. The bombing of Dresden was really unnecessary, as was the Nagasaki A bomb.