The support that Donald Trump has received from legions of evangelicals has puzzled and "surprised" many people. After all, the presumptive Republican nominee is exceptionally vulgar and, despite claiming to be a devout Christian whose favorite book is the Bible, knows little about scripture and has emphasized, "I don't like to have to ask for forgiveness" from God. One common explanation for this apparent contradiction is that numerous evangelicals embrace Trump's agenda, from eviscerating Obamacare to cracking down on undocumented immigrants and barring Muslims from entering America. But Trump and his evangelical supporters think alike in more ways than people realize. Fundamentalist approaches to evangelicalism have long fostered anti-intellectual, anti-rational, black-and-white, and authoritarian mindsets—the very traits that define Trump.