That book was, of course, biased, I‘d wager. But are propaganda writings not supposed to be? Propaganda has to be simple and full of half-truths. Facts are not important. Unlike other wars, it continued unabated after the cessation of hostilities.
Imagine if „Zhang Fei“, who most probably was raised on a diet of such and similar works (hacks like Rex Stout and the other blood- guzzlers of the so called Writers‘ war board come to mind) - not to mention the hellfire on nitrocellulose which was churned out by Hollywood, so dreadful they make even Nazi and Soviet propaganda film look relatively harmless by comparison - had a say in America‘s foreign policy…
But, as it turned out, there was sharp criticism of these propaganda works, too. America was, after all, far more moral than her opponents.
Still, Nietzsche‘s famous dictum proved true once more: „When you gaze into the abyss for too long, the abyss will eventually gaze back at you“.
All the best for you😀