I note it as an interesting point in history and that is all. I support the use of those weapons and the lives of both sides they saved in convincing the emperor of japan to capitulate rather than continue to submit to the will of the military group in charge at the time. A full on invasion of the country would have been far far more costly in lives. The fact that those folks died as a result of an atomic bomb did not make them any deader than those who died as a result of a conventional bomb nor any more drastically than those who died as a result of LeMay's shift to fire bombing. I just do not see the difference in either death.
My regret is that the folks who were in charge of the various belligerent countries, Germany, Italy and Japan could not see to stop their desire to rule and impose their will on others, including their own countrymen.