A key tenet of progressive belief is that one can manipulate the thoughts of a populace by:

1) banning or altering the words they are allowed to use 2) introducing new words to soften concepts which were previously seen as weird, unusual, or deviant.

For example, the replacement of "prostitute" with "sex worker", or "undocumented immigrant" with "illegal aliens". The new terms obfuscate the plain meaning of the prior terms, thereby softening the subject in the minds of the populace one is trying to manipulate.