

This is not a function of dementia. This is a result of a man so narcissistic and self-obsessed, that he can literally not imagine that other people exist on this planet. It’s not that he doesn’t care about other people. He doesn’t even acknowledge the possibility that others exist.
Is an extreme form of solipsism. If you don’t know what that is, you really should.
There’s nothing “New“ about this. This is Fascism 101. Deny the accusation and then blame your accuser of the same thing.
It is definitely part of the Steve Bannon strategy of “flood the zone with shit“. Just like his threat to sue AOC into bankruptcy over her, very legal remark, calling Trump, a rapist. Because he is, and he has been adjudicated as such.
This is an elaborate form of gaslighting. Trump‘s goal is not to undermine the common concept of fact and reality. That’s what Hitler did, but Hitler had a plan. Trump is both demented and extremely stupid. He’s not trying to rewrite our reality, he’s just trying to reconcile his own twisted concept of reality with actual reality. Poorly. There are similarly destructive consequences, but understanding the root of the problem is crucial to remedying it.
We all realized this in 2015, before he was elected the first time. The only way to stop it is to kill him. And then, unless anyone actually does that, we are all going to suffer the consequences.