I think I outlined it to the best of my ability in the post you quoted,
@JJ Husker. It all depends on context. We're not going to police someone's beliefs, however, the nature in which you share your opinion does matter. We've suspended/banned people for posting racist content on the board. We've suspended/banned people for saying racist things.
Specific to your question, it is not explicitly against board rules to "hold racist beliefs." However, you could be reprimanded for sharing them, depending on how and when.
As for the other post from Ric you keep mentioning, I believe it was moved primarily because it was related to the other, more egregious post that got him in trouble.
Also, I'm not sure why it's not showing up under their avatars, but they're definitely banned.