You seem to completely misunderstand American diplomacy.

Just because America doesn't have the same style of conquest, doesn't mean they aren't conquerors.

America was the first empire to realize that all empires eventually fall whose agenda is toppling nations and replacing their flags with their own.

The USA invented a unique twist: never replacing the country's flag.

Instead, as evidenced by countless examples such as Iran and Panama, the American agenda has always been installing a new national leader whose interests align with American ideals of democracy and "freedom" (predominantly of the white Christian variety). But they keep their "flag", or in some sense maintain a national identity through the new leader, so it feels a lot less like they were conquered.