Stephen Miller is a subhuman piece of garbage. He's pretty much directly responsible for every single piece of race-based Executive Action in the Trump White House. He honestly believes he's a true Svengali/Jafar/Puppeteer of people, and regularly flips out when confronted with truth and facts. His own family calls out his Jewish heritage, and he's aligned with White Nationalist groups. Insane.
Good piece on it: https://www.newyorker.com/magazine/2020/03/02/how-stephen-miller-manipulates-donald-trump-to-further-his-immigration-obsession