I have been following the thread with considerable interest, - it has been a fascinating discussion - and, as the thread seems to be about the topics of MacRumors, moderation and racism, - and where they meet and intersect - there are a few points that I would like to raise which, hopefully, may add a little to the discussion.
There is the matter of context, as
@yaxomoxay (for whom I have considerable respect as a poster, not just even when we disagree, but especially when we disagree) has already remarked.
And, within the subject of context, there are two or three different further categories where what is understood by context defines the wider terms of debate.
The first of these contexts is the fraught and extraordinarily contested and disputed history of race within the US.
Yes, other countries and empires had slaves and made grotesque fortunes from the state sanctioned abuse of fellow human beings, (Belgium's appalling empire in what was then known as the Belgian Congo is an especially grotesque example).
However, only the US created a federal state based on the principle of human rights - "all men are created equal" which simultaneously excluded some specific people (those who were slaves) from being accorded those same rights, - a situation which created a complete philosophical contradiction at the level of identity defined by the federal state's core principles - and later still, fought a civil war contesting the right of some states to establish a separate federal state designed to uphold slavery as an economic, social and political system.
So, the issue of race is contentious, divisive and germane to discussions of how identity, and language and speech are expressed in the US, in a way that no other such social or ethnic division (not social class, and not even gender - and both of these matter, enormously, and, not even religion which is explosive elsewhere).
A second matter of context is the role played in the US of the First Amendment, which is revered as allowing and enabling and facilitatingg freedom of speech, and which, traditionally, allows for a greater freedom of expression than one would find even in the most liberal of democracies in western Europe, where strict laws prohibiting hate speech serve to remove the most egregious examples of such from print and TV (but not from the online world which is not regulated to the same degree, although that debate has yet to take place).
I could make the argument that such extensive freedom of expression ought to carry some sense of obligation or responsibility to put careful thought into what one says in a public forum, as a consequence.
And, a third matter of context, is both the increasing importance of online debate in socio-economic-cultural and political debates, on the one hand, and, on the other, the marked coarsening in both content and tone of much public (and online) discussion and debate that has occurred since the time of the last presidential campaign four years ago.
Thus, taken all together, these three intersecting and interlocking contexts, - the context of the history of the peculiarly fraught nature of race relations in the US which means that racist terms carry an especial sting of offensive contempt that other insults intended to give offence may lack, the fact that freedom of speech is unusually strongly defended in the US, and the fact that the tone and content of much public debate has become coarsened in recent years - all of that means that thought may have to be given to the notion that rules that may have worked in the past, in the case of MR, in regulating debate in the forum may have to be revised somewhat, both in how they are defined and how they may be implemented and enforced.