A white supremacist took MDMA for a study, and it snapped him out of his beliefs: 'Why am I doing this?'

But in the case of Brendan, he had recently been exposed as a white supremacist and lost his job when he was enrolled in the study. He was full of regret about getting caught out.

I imagine that this person was already contemplating personal growth, and the drugs just kicked his not-fully-conscious or not-fully=acknowledged feelings into conscious, actionable thought.