A social site like Poal or other Reddit clones should protect the ability of its users to express opinions of every kind, even opinions unpopular with liberals. Who died and made the liberals lords of censorship? Who is to say that opinions on race that are unpopular with liberals are necessarily untrue? For example, what this person linked to by the OP wants is for any negative statement about blacks as a race to be prohibited. But the thing is, many negative statements about blacks as a race are perfectly accurate and true -- that blacks as a race have a much lower intelligence than whites or Asians is undeniable, even though liberals continue to deny it. We all need to be able to express unpopular general truths, and even unpopular general views that may not be true. Attacks on individuals should not be permitted. That's where the line needs to be drawn. That's where it has been drawn in common law for centuries. Libels and harassments should not be tolerated.