My experience is far more like your parent commenter's than to yours. Very pro-America, all black-and-white, no need to reason about or analyze murky grey areas

My experience is far more like your parent commenter's than to yours. Very pro-America, all black-and-white, no need to reason about or analyze murky grey areas or anything that is recent enough to possibly offend somebody's parents (eg Vietnam War wasn't covered). None of that was ever mentioned in my schooling. US schools do vary a lot.