Moot point .
There is no good day to praise Japanese brilliance for the attack, but Pearl Harbor day is certainly the worst possible day to do so.
Since the war did not end so well for Japan, the attack was hardly brilliant...it was a fatal blunder. Japan never thought the US had the guts or capability to fight back.
Had Newt used the word "dastardly" I doubt I would have raised an eyebrow.
I suppose you'd be fine if he described the "911" attack as "professional brilliance." It was the ultimate act of cowards.