I suggest you familiarize yourself with WW2 history before being an apologist for Japan in that period. Whether it was the Rape of Nanking, or that of Manila, or fatal medical experiments on prisoners, they brought unbelievable horror to civilians.
One fact does not cancel out the other.
You don't need to be a Y apologist to criticize the behavior of X, their enemy.
Neither, however, is an attempt to excuse what either the Japanese nor the Germans did in either war. I am very familiar with the events you describe, but please don't read anything broader into my example than merely that; an example of making your enemies cartoonish.
What makes you think the GP isn't familiar with it? The vile propaganda and sheer racism of the US against Japan and the Japanese is established fact, regardless of Japan's own actions.
Henri Kissinger's book, World order, is a great example of this approach.