The RAF bombed Berlin in pure revenge for the Luftwaffe bombing British cities at the start.
Allied fighter-bombers destroyed trains, ships and columns with civilians in them.
As with, evan, I don't think it was wrong. After all, total war had already been declared no one was going to be safe. Both sides did it though, that is what has to be remembered.
World War 2 wasn't as black and white as history likes to make out.