It's why people can advocate for ethnic cleansing here, and that's fine as long as they word it correctly, but if someone calls them an asshole about it, they're flagged.
Really common in rationalist circles from my experience as well because they believe that true statements aren't always normative, and that, since their arguments are true because they're rational, their statements aren't necessarily normative. Begging the question, of course, but I see that in situations like Scott Alexander's defense of "human biodiversity" theories (the whole HBD moniker is itself an example of everything I'm talking about condensed into two words).