Eisenhower and Churchill agonized over a possible 160,000 French civilians being killed in massive Allied bombing of France in the days before D-Day.
Churchill faced the problem of getting along with post war France with so many civilians killed. After consulting with Allied French military leaders and resistance members, the decision was made for all out bombing after the French told them if it killed twice that many civilians, it would be worth it to be rid of the German occupation forces. The rest is history.
Though fictitious, or at least wildly misleading, your scenario sounds monstrous.