Earlier quoted context omitted.
Like, for instance, that the Japanese diplomatic codes had been broken and that the administration had prior knowledge of an imminent attack on Pearl Harbor, yet chose to do nothing, because the public response would finally allow the U.S. to enter the war? Absolutely, it would have been heroic. It might have led to real justice instead of ruinous warmongering.
It might have led to real justice instead of ruinous warmongering If allowing Japan to continue its (quite brutal) invasion of China is what you call justice, I'm not sure we are seeing eye to eye here. Entering the war made a mess, but so would have staying out of it. The mess was already in motion, it was too late to avoid it either way.
I do not accept as axiomatic that war can be made less horrible by adding more combatants.