The sin of dying to fight the Japanese on Philippine soil.
The converse sin is starting a war with the Japs, as Roosevelt did with sanctions(against strong objections from the Phil gov of the day), and then failing to protect the Phil from the inevitable result.
And THAT spin is not usual in the Phil, but its the truth.
The Filipinos were way less conscious or bitter about it than the American “battling bastards of Bataan” btw.