Gibraltor is the best landing spot when then can enter the war. From this spot, they can land just about anywhere they want.
Western Germany (If UK can take Denmark ahead of them and hold it)
With the Naval Base damaged, they can only reach Normandy or Southern France.
Remember, “If you defend everywhere, you defend no where.”
Bombing the Naval Base takes pressure off of the Axis. Germany will gain another turn not worrying if the US is going to attack Italy or land in UK or Norway or where ever. They can concentrate on Normandy and Southern France. Or let Italy defend Southern France and Germany Normandy.
I find it very interesting and will make plans to use this.