It's funny. Somebody said that it's telling when a Japanese understands and writes superheroes better than the Americans do. And the irony in it is that Cap was born out of military propaganda against Allies' enemies in WWII (well, primarily the Nazis, but this would also extend to their Allies, the Japanese.)
BTW, I'm not talking about OPM here. Go read ch. 92 of a certain manga *cough*.
Not gonna claim that I know much about American comics, but Captain America was
not born out of military propaganda against Allied enemies. He was created by Jews, for Jews, as a symbol of strength and hope for oppressed Jews.
Honestly, while dumb, i can understand why they wanted to change things up. It's a creative spin on things, and hell, the amount of controversy over this is exactly what they wanted, it brings them attention, which was the point of the whole thing to begin with. SJW's may be adamant against the new storyline online, but I highly doubt many are going to drop the series over it.