The audio compression on YT doesn't do this justice at all. As far as I can tell, this is the Polish Radio National Symphony Orchestra performance found on "Anaklasis; Threnody; etc."
With the release of the once classified strategic bombing surveys its become pretty clear that civilian area bombing was pretty useless in meaningfully hastening the end of war in either the European or Pacific theaters. What worked well was destroying transport links, which unravels the target's industrial economy much more effectively.
The surveys also indicate that Japan was within a month or two of surrendering even before they lost their army in Manchuria to the Soviet Union's entry and a couple of middling towns in Hokkaido to small nukes. Its pretty clear to me that warding the Soviets away from West Europe was a substantial reason for nuking the mostly innocents (elderly, women & children were the vast majority of the killed). Its hence possible that Hiroshima saved lives, not by cancelling the Olympic invasion, but by preventing escalation in the Berlin crisis of 1949 or Hungarian revolt of 1956.
But, back to Cena_mark, there is no substantial difference in his reasoning on "justice" with that of Al-Qaeda terrorists.
I remember seeing the score for this in a music history class. At times, instead of regular notation he would mark a dark swath across the pitches that he wanted to be played, preferably as many as possible. This would swell from a bold line in the middle of the staff to a terrifying blackness on the page.