Not sure how true it is that Eisenhower was against using the bomb, but it seems to be accepted as historical fact. Iirc, there were other high ranking officers that also saw it as unnecessary. I wouldn't say anyone ever deserves it. Strategically unavoidable maybe? I'm not going to pretend to understand the stratagies, but based on what we know now and that even the allied commander was against it I'm going to say it was not needed.