My father did a tour (Halifaxes from Topcliffe, Yorkshire), and would be dismayed at the attitude shown to Harris nowadays. Like so many at the time, his own father had been killed in the WW1 trenches. It does give you another view on things. Subsequently he was on Dakotas in Burma. There has never been any of this negativity against the campaign there.
There was an extremely straightforward task, and that was to win against an extraordinary aggressor who had galvanised his whole country likewise against most of the countries of Europe. Bear in mind everything done was with the approval of Churchill and the Government, Harris was not the ultimate decision maker.