Re: War Is Bad
The campaign against oil facilities was fairly effective according to the post war bombing survey.
The American daylight bombing campaign crippled the Luftwaffe by forcing German day fighters to engage the bombers, the Allied fighter escorts then shooting them down. (The nighttime attacks are credited with drawing resources -eg 88mm guns, ammunition, and gun crews - away from the ground fronts.)
With the Luftwaffe in the West nowhere to be seen on D-Day and the North West Europe campaign it's not surprising the Allied tactical air forces were particularly effective.