the simple fact that Japanese are not white and were fighting against ‘white supremacy’.
Which is a sick joke, considering Japanese racial attitudes,
specifically toward the other Asian ethnicities and nationalities that they conquered.I also suspect that impugning American motives for fighting Japan is part of some attempt to argue the USA was ‘ignoring’ the Nazis or actively supportive of them, and focused only on their ‘imperial’ sphere in the pacific which Japan threatened.
The US maintained diplomatic relations with the USSR from 1933 until its collapse, and Lend-Lease helped both the UK and the USSR. FDR was always unequivocal in his defense of American democracy against fascism, and considering the prominence of Vice President Henry Wallace in his third term ie. during the War, and his own somewhat naïve attitudes toward the USSR and Stalin (for which he was forever condemned by conservatives and some anti-Communist liberals, of course), it's both inaccurate--and I'd argue, defamatory in the historical sense--to accuse FDR, and the US as a whole, of ignoring the Nazis or worse.
While we're on the subject, I have never seen any evidence that anywhere close to a majority of Americans ever sympathized with the Nazis or Fascists. Opposing American entry into another European war was a different matter, but that was
not the same thing; isolationism/non-interventionism in most circumstances is and was the historical norm for most Americans. Contrast Americans' hostility toward fascism with the fortunes of the Left: the CPUSA was at its height during the 1930s, what with the Popular Front strategy. And of course, the New Deal was massively popular, as was FDR (see: 1936 presidential election). For anyone on the "Left" to claim otherwise is nothing less than an embarrassing act of historical self-negation, the kind that flatters the importance of the tiny minority of actual Nazis and fascist sympathizers in the US, along with the views of the wealthy reactionaries who were instrumental in bankrolling first the Old Right and the original "America First" movement, and later, much of the modern conservative movement and their "actually, the New Deal made the Depression worse, checkmate, libs!" propaganda.
It takes a special kind of self-defeating stupidity to disown the historical achievements of your own political side to the point that you arrive at essentially the same (wrong) conclusions as the people whom are ostensibly your greatest adversaries, but well, that's the New Left or the New New Left or whatever the hell for you.