See this:
The Toxoplasma Of Rage | Slate Star Codex
Compare this to the three most viewed category of post. Politics is self-explanatory. Race and gender are a type of politics even more controversial and outrage-inducing than regular politics. And that “regret” all the way on the right is my “things i will regret writing” tag, for posts that I know are going to start huge fights and probably get me in lots of trouble. They’re usually race and gender as well, but digging deep into the really really controversial race and gender related issues.
Certain topics are fundamentally more controversial.