JLM, that doesn’t mean anything. Blacks still do refer to each other as ni----s. That is acceptable (at least to blacks). However, non blacks may not refer to a black that way.
So the fact that a group or a race refers to itself by a certain epithet in no way indicates that it considers it acceptable for others to use the epithet.
You don’t like corned beef? Then I guess you would be even more put off by haggis. The proper way to celebrate Bobby Burns day is with haggis and turnips.