I've posted before on comment rules and why I ban commenters. And the basic comment rules are continuously posted on the sidebar of this page.
Apparently I was not specific enough, so let me clarify one more point.
Let's say you think the African-American community is poorly led. The proper way to express that would be to write "Blacks have bad leadership," or "Jesse Jackson is corrupt," etc. It would not be correct to write watermelon jokes or to call someone else a "Ni*@er lover" or to speak of the "melanin endowed."
I admit I am slow to ban racist commenters. Why? Because I think it is important for people to see the very real racism that exists, especially when that racism comes from our own.
Jews – even Orthodox Jews – should be sensitive to the corrosive effects of racism. We should be concerned, not only for the hurt inflicted on innocent blacks, but for the hurt inflicted on ourselves and society at large through the corrosive, vile effects of racism and bigotry.
If concern for larger society is not important enough to you, I would think the hurt racist comments inflict on Jews of color would be important enough to get you to think carefully before hurling racist insults. We have readers who are Ethiopian Jews and we have readers who are African-American Jews. Racist comment hurt them, too, as many have pointed out.
If you do not like something or someone or some group, by all means, make your case – just do so without the N-word or any of its variants and relatives.