I think the other big problem here is that a person can become acculturated to a lot of garbage ideas, and when they then act rationally within such a belief system, the rest of us want to take solace in calling them mentally ill, when what has really happened is exactly that they fell down some kind of 'rabbit hole' that created a distortion of their reality and thus warped what they believed was rational action. We don't want to describe it this way because once we do, the onus falls on society to do more than just fix broken patients therapeutically, the requirement is to fix the broken society whose terrain has become so littered with those rabbit holes, and no-one wants to hear that, especially the 'don't-tell-me-there-is-any-thing-wrong with-America-too-many-immigrants-already-want-to-come-here' crowd.