Speculation does not justify murder.

The "greater good" argument is not only extremely tenuous (strategically, the country was already defeated, and leaders had been asking for surrender for months prior (see links above)) but this "greater good" argument is, more importantly, nonsensical and morally illegitimate.Taking the life of an innocent human being is never moral, ethical, or legitimate. It is nonsense to assert that taking innocent lives is ever a "necessity" for just society, as taking innocent lives is, has been, and always will be, categorically unjust.