Be careful with this one. Via Science of Us:
This might seem like too thin a point to harp on, but it’s actually important given people’s tendencies to over-extrapolate from limited study findings: “People who are more racist are more likely to make unprincipled arguments about free speech” is a very different claim than “People who make principled arguments about free speech are more likely to be racist.” This study supports the former but doesn’t say a word about the latter, and there really are some people who are committed to certain free-speech principles regardless of the content of the speech involved. All the more reason to have these conversations in as nuanced and principled a manner as possible.
Singal, Jesse. “Are People Who Defend Free Speech More Racist Than Those Who Do Not?” Science of Us. 8 May 2017.