alt Hacker NewsIf someone at work was writing blog posts with white-supremacist code, then yes, I would probably go to HR and they would probably get in trouble. Maybe they wouldn't be fired, but they would be placed on another team. And then the people on that team would find the blog posts, and the same thing would happen, and they would probably be let go at some point.
Because people that do that type of thing usually cannot shut up about it.
Noam Chomsky: 'If we don't believe in freedom of expression for people we despise, we don't believe in it at all.'
Also, your solution doesn't solve your problem: your colleague won't stop to hold ideas that you don't like, nor his blog will disappear. If it's just a blog, he didn't harmed anybody, whereas you got him fired.