I've taken trolls down, many times before, but this guy was pretty much unhinged. I hadn't written anything confrontational or the least bit objectionable to anyone but him, so I think being offended and picking fights was just on his agenda.
I tried to ask what did I write that he found so objectionable - he went off on a rant. I told him that it was obvious his issues had nothing to do with anything I wrote, so let's move on. He went off on a more vile and nonsensical rant. So I finally told him I'd been out of the Medical corps for a long time and my direct patient care skills weren't up to snuff enough to deal with someone with his issues. So 'goodnight'. That triggered the 5 or 6 responses that I never bothered to read because, what's the point. He ended up getting pretty much swarmed and called out by a large number of people.
I check out his profile page, and my suspicion is that he was just a right wing poser who was trolling a Democratic site. And, honestly, I think ignoring him was a bigger slam than anything I could have written.