Thanks for your comment, let me give you more context.
> I guess what I genuinely don't understand is why lists are more harmful to the community than rudeness and vitriol.
Lists were allowed, turned out to be an unmaintainable mess with our current format, which was sincerely hurting the community. The top voted content was bad content. This in turn primed and encouraged users to post even more bad content.
Rudeness and offensive behavior against other users are not tolerated. No ifs and no buts. I might have given you the impression that we allow users to insult each other. We don't.
http://meta.stackexchange.com/questions/240839/the-new-new-b...
However, unless we put a word filter on any possible bad word, there will always be rough comments. The only thing we can do is ask the users to flag such comments and remove them as appropriate.
A user flagged the comment one hour ago and the comment has since been deleted.
Read facebook. Read twitter. Stack overflow is not remotely like those places, yet it is one of the top 30 networks in the world by traffic.
We heavily moderate rudeness, but we are not going to be able to moderate every opinion that someone is going to find remotely offensive before it offends anyone. What you are expecting is simply not realistic.
> If I post a question that asks for an opinion or list, someone will swoop in and edit it or delete it. Why can't we do the same when someone embeds a little bit of professional problem solving with a lot of unprofessional personal attacks?
As I said, we do delete such comments, as we did in this case.