The way people use language is very complex. A root you are addressing the way language, rhetoric, is employed by the powerful to explain and legitimize their actions; just for starters. Using a broad brush, the ritualized use of language becomes a norm, a display; which doesn't mean that the individual necessarily 'believes'
what they are saying, but it's what's expected and defined by the context the utterance is part of.
This whole area, language, is probably why Chomsky's critique of capitalist civilization has been so devastating.