Maybe because the link is highly misleading. The linked email is not very offensive, and was not the reason for the ban, apparently. The EMails that were, were removed from the list.

dong does not know who ESR is

Its hilarious because all sorts of highly politicized articles which bring out the worst and promote ignorance/ psuedo-intelleculism in people get front paged all the time and are justified under some vague rule, but this, which is probably a little more relevant to HN is flagged.