How can people not see through this guy?
I don't know how to answer that question. What's even more distressing is that they've now had 3 years of daily examples, and still feel compelled to defend him at every single turn. No matter what the story is, no matter what he's done. I'm sure they watch all this stuff go down, knowing (like the rest of us) that this is not how normal people behave.
I have to conclude one or any of these things:
1. They really don't see it at all- and are completely in his thrall (Trump U grads).
2. They see it, but fight hard for their tribe, of whom he's the Chief (partisans).
3. They see it- and they love it (deplorables in the basket).
Outside of that, I have no explanation.