reactance

The push-back a person feels when their freedom to choose seems squeezed — told what to think, they grip their own thought harder.

Psychology's name (Brehm, 1966) for a motive, not an opinion: the content of the message matters less than the felt loss of room. It is why forewarning people of a persuasion attempt makes them resist even good arguments, and why a disclosure that merely unmasks steering breaks trust while one that hands over a choice can build it — consent returns the room that reactance misses. Some people carry more of it than others (trait reactance), so the same honest sentence can free one reader and insult the next.