People don't know the half of it, and in my experience, they don't want to know. It's comforting to feel like the good guys. The media is complicit, in that it intentionally leaves out relevant facts that might make us look bad.
For example, take Iran. In 1953, we overthrew their democratically-elected government in favor of the opposition, because their citizens didn't want BP to have control of their oil. We bribed politicians, street thugs, and demonstrators; incited deadly riots; bombed houses; etc. BP actually contributed funds to help out: https://en.wikipedia.org/wiki/1953_Iranian_coup_d'état
Or you've probably never heard of Iran Flight 655, where in 1988 a reckless US cruiser drifted into Iranian waters and shot down an Iranian commercial airplane in Iranian airspace. 290 fatalities, including women and children. 8th deadliest disaster in aviation history, nary a peep in the US media: https://en.wikipedia.org/wiki/Iran_Air_Flight_655. But they are the reckless terrorists to watch out for.
And it gets worse, much much worse. Look into our activities in South America, especially Guatemala. Our terrorist activities in Cuba. Our "defense" of Vietnam. Our thinly-justified and roundly-condemned embargoes. (Quite common to see UN votes that are 190-1, everyone vs the US. Or the US and Israel.) We've killed hundreds of thousands, millions of people in many cases. Often explicitly for US business interests.
Honestly, I somewhat doubt a thread like this could make it to the top of HN at a time when most Americans aren't sleeping. Americans don't want to read this stuff.