Though fictitious, or at least wildly misleading, your scenario sounds monstrous.
It was not my scenario. It was the one implemented by Eisenhower with the French and Churchill’s acquiesence.
The total number of civilian deaths was closer to 80,000.
You will find this in “The Americans at D-Day, GBE American experience at the Normandy Invasion,” by John C. McManus who is a Professor of Military History at the University of Missouri.
What was monstrous was the entire war brought on by Hitler and the Axis that resulted in the deaths of 50 million people worldwide.