Give this excellent talk a watch/listen: https://www.youtube.com/watch?v=CRo-ieBEw-8
Most of what he says I had already intuited, but it still gives me a name and more details on the etiology of this global mental illness.
What I will suggest is that Trump Derangement Syndrome really was an example of Mass Formation, and broadly speaking much of the Left in general, as an undifferentiated, ideologically activated lump, has long been characterized in large measure by this term. It really does seem that the more ridiculous the idea, the more fervently they believe it.
I called them Headless Ones, per a dream I had back in 2012. These are the same people. They are all anger and alienation and unresolvable anxiety. They are happy to do ANYTHING they are told, since the idea of the pain of differentiation, which is separation, is psychologically unbearable to them once they have gone all in, and placed their souls on an altar and their heads in a basket.
And it has long been my policy, as he says, to never give them an unopposed space. Always get in there, in at least some way, and keep the mass from getting harder and denser and more violent. Disrupt their rhythm. Insert a small no in a sea of YESES.