The reason we didn't hear about Lindbergh's politics in school is that he was a minor historical personage who only figures in history books because he was first to fly the Atlantic alone and nonstop.

The only reasons to mention him are that it was a big deal in 1927 and he represented American knowhow and daring.

I don't think it's worth anyone's time to tell schoolkids, "But he later admired Hitler as a national leader."

Even in a college course on the Depression, it's no more than disappointing (though possibly disillusioning) trivia.