Morals are relative, you shouldn't assume that everyone everywhere thinks the same way that most Westerners do. Most non-Western countries in fact do not make much of a fuss over racism, or when they do it's usually influenced by American media.
So, in order to not surprise people from non-Western backgrounds it should be made clear that racism isn't tolerated in any forms.
But in the case of Kas's letter specifically, this is much ado about nothing. It's a minor comment that's been blown out of porportion. In order to solve the issue, all that had to be done was to contact Kas privately OOC and warn him that that kind of thing is a bit controversial around here. At this point Kas probably knows not to do it again, so punishment would be useless and unfair in light of the fact that Western moral values aren't universally known.
