Again more intentional bluster to demonize and vilify persons and organizations based not on any reality but to incite negative feelings amongst his supporters. This is not dementia, it is the strategy he learned from Roy Cohn and Joseph McCarthy. The baiting that Harris did was just to get him to repeat his memes in an obviously angry way so that those who didn't read them from his echosphere could see the original context of their absurdity.
The problem is that he is easily baited (Harris) and or flattered (Loomer, Putin) into accepting and expressing these absurdities presented to him that he then thinks will be useful in his strategies.
I think what struck me in the article was his statement that ABC is under investigation. ABC is owned by Disney, which has been in the right-wing's sights for a while now. But yeah, it's reminiscent of Cohn and McCarthy and their "investigations." Shades of things to come if Trump gets his way.