The New York Times wrote a well-researched article on the origins of Stephen Miller. From the reporting, it appears that Miller was a hateful troll even at a young age.
Through Mr. Miller’s nearly nine months in the Trump White House, the question — how did he come from here [Santa Monica]? — has curdled across these eight square miles of progressive oceanside paradise, where a stroll near the beach can quickly produce images that border on a self-parody of limousine liberalism. Environmentalist stickers festoon a neighborhood pocked with gas guzzlers; a small dog, seated in a stroller, twitches in the sea breeze, rumbling past a homeless man sprawled across a sidewalk bench.
Throughout high school, Miller was a troll.
[In high school, Miller] jumped, uninvited, into the final stretch of a girls’ track meet, apparently intent on proving his athletic supremacy over the opposite sex. (The White House, reaching for exculpatory context, noted that this was a girls’ team from another school, not his own.)
He was known as anti-Latino.
Several students said Mr. Miller’s trail of racially tinged comments amounted to a pattern. He railed against bilingual announcements, asking in a local editorial why there were “usually very few, if any, Hispanic students in my honors classes, despite the large number of Hispanic students that attend our school.” “He tended to make some of the Spanish language stuff very personal,” said Moises Castillo, a classmate who described the exchanges as hurtful to this day. “There was a ‘if you’re not speaking English, perhaps you should go somewhere else.’”
His Rabbi appears disappointed by how he turned out.
“We did our best here,” said Mr. Miller’s rabbi, Jeff Marx, “to teach Jewish ethics and talk about our need to reach out to the strangers, to those less fortunate than we are.”