If you were typecasting WH aide Stephen Miller, he'd be the zealous fanatic

[highplainsdem]

who could do infinite harm in the pursuit of his beliefs, and who would never be capable of doubting himself for a second.

This blog post from the Psychology Today website describes the type perfectly:

https://www.psychologytoday.com/blog/ambigamy/201411/fanaticism-is-disease-alcoholism

Fanaticism Is a Disease Like Alcoholism


Fanatics, ideologues and absolutists are humanity’s greatest scourge. Whether they’re the leaders or the followers, fanatics are people who indulge in a heady, intoxicating and toxic concoction of self-affirming, know-it-all confidence that they have unique access to absolute truths, truths so perfect that they have to impose them on everyone.

The absolute truths that fanatics latch onto might be religious or political, right wing or left wing, Christian or Islamic, libertarian or communist, new age spiritual or old-time religious. It’s not what they believe that makes them fanatics but how they believe it, that they have final word, no need to consider further evidence, no need to ever wonder or doubt themselves again.

Fanaticism is a drug. Let loose on society it's like crack cocaine or alcohol only worse. Fanatics drive through life like alcoholics driving under the influence. They think they’re perfectly fine driving. They kill innocent bystanders, sometimes by the thousands or millions.

-snip-

Miller, like Bannon, is a fanatic. And having them anywhere near power is a disaster.

[highplainsdem]

1. NYT article on Miller, cowritten by Glenn Thrush:

"Stephen Miller Is a ‘True Believer’ Behind Core Trump Policies"

https://www.nytimes.com/2017/02/11/us/politics/stephen-miller-donald-trump-adviser.html