I am glad that you brought this up, even though I am very very sad to read it.
You´re right, the admin community is perhaps in a phase where we are not 24/7 on the forum, available to block horrible posts such as that one. The ideal would be able to directly filter posts that are unnecessarily vulgar, offensive and a help to no one in our community. We are now absolutely instating measures to ensure that such a post does not pass us again.
However, as Henrietta said, that is not the case currently and so the post stayed on the forum for much too long. You mentioned that you felt as though someone was in the background "watching" during this time, and I see what you mean by that. I am so happy and proud of the community because that post did not turn into some angry and inflamed commentary. It was primarily ignored as it should have been until it was deleted.
The user was sent an email before the question was deleted (although I don´t think that the email address given was real). Unfortunately trolls are inherent to the internet, and especially forums, so you are right that there has to be a tactic against them. We do not not tolerate that kind of troll, period. The inaction was a failure of vigilance, not a failure of our position towards bigotry and hatefulness.
The question and responses were then deleted along with the user´s account. As I said, I am happy that you brought this up because it should be made absolutely clear to any other trolls out there that those posts will absolutely NOT be tolerated. However, the question had to be deleted because (besides being offensive and crude) it was not helpful to anyone in the community. It was not a source of information, knowledge, or would it have been a means of having a conversation like we are now.
All of that being said, your decision is as always respected. I would also like to hear more about suggestions as to how to fight trolls! We really value our community so much exactly because of these conversations.
All the best,