It really is ridiculous. I don't think the Post is obligated to have a comments section, but I'd read through most of the comments and there wasn't any "hate speech" or over the top "personal attacks" and I don't even remember seeing any profanity though I wouldn't be surprised if some was there. Not everything which is a bit mean is "hate speech" or a "personal attack."
The Post said they wanted a discourse, but part of the reason people were rather angry was that Howell was not providing honest discourse.
So, they blame their readers. Nice job!