Additionally, people with moderate FAS or Down Syndrome understand when someone is treating them poorly or unfairly. A human is completely capable of not being able to read but absolutely being able to know when they are being abused.
If Phil’s supporters still have functional autonomic nervous systems, they are continuing to support him because they want to. There is no “seeing the light” or whatever; Phil isn’t smart or disciplined enough to conceal long-term how he feels about anyone or anything. It is purely a matter of when (not if) he turns his ire toward any one dent until they leave, or if he stops entertaining them. That’s it. You would have to be comatose to miss how Phil treats his audience. The ones who are still giving him money are well aware of how he is; they’ve just not been given sufficient reason to stop, because they clearly don’t care how Phil treats anyone else, just themselves.