The Japanese often agonize over the decision to bomb Hiroshima
at the end of WW2. Oh, the suffering, oh, the agony! Why, oh why?

Or in the words of Ted Nugent: I'll show you some security and I'll show you some peace: Nagasaki and Hiroshima. You fuck with us and we'll fucking melt you.
Q.E.D. (Despite what the Communo-Revisionists are teaching nowadays.)
Oh, and you're welcome for all the hundreds of thousands of
lives we saved by nuking you rather than having to invade you, too.