What I find amazing about Trump is his trickster quality and the way he compels so much attention .. we cant seem to stop talking about him regardless of how much we want him to disappear.
Your take on the wall makes a lot of sense. Its a giant boondoggle that makes him sound like he cares about something, but the undercurrent of demonizing non-Whites clearly stems from Miller's white nationalist agenda. But of course it's also from Trump, considering his long history of racist positions. From the Birther Movement to the recent Dreamer fiasco, Trump shows himself as completely amoral and prepared to scapegoat. Basically the Birther stance says Obama is himself a Dreamer .. not legally residnt in this country, not a valid president. It is a great tragedy that Trump comes after Obama and says so much about the nation, but in a very real sense Trump needed Obama desperately. Without Obama we wouldnt have Trump. It's all very entangled.
There's also that crazy old TV show about the huckster wanting to build a wall. Its so crazy how Trump channels all this 19th century baggage.