Maybe this is some cultural difference, but I kinda don't get why using n-word is different from using any other slurs. Most people would agree (I hope) that slurs are not part of normal, civil discussion, and I cannot understand why would anyone try to create a safe space for discussion with someone who calls them "motherf*** fa**". I think such person has no interest in polite conversation, unless, of course, in other countries being showered with word vomit is considered a normal conversation starter, akin to "We have different views, let's talk about that"