I'm over there a lot, I dunno. He's called me various names over the years (I told him however much of an a-hole I am, he'll always be a thousand times bigger a-hole, which he seemed to take in good spirit). He rants against games I like. He conflates White Wolf 'Storyteller' Railroading with Forgeist Story-Creation games. He basically seems harmless to me, though. I guess I'm fond of crazy Libertarian types. I don't see any sign of harrassment or stalking. I guess his vitriol could be considered personal abuse if you're of a sensitive disposition. It comes across more as a schtick than malevolent to me, though.
(If this post comes across as S'mon donning the Mook Uniform of Lawful Evil Alignment, well, I think we should all just get along).
No this post comes across "I'm a straight white guy who lived a pretty safe life and never actually been threatened or harassed in a serious way, and thinks people who have been are 'sensitive'". Whether that's better or worse than being a Hobgoblin I leave as an exercise to you. This is a consistent problem with people defending extremely abusive people - "it's just a joke" "grow a pair" "man up" "it's just a schtick" "it's funny man" - there literally isn't anything, no matter how incredibly vile, that someone hasn't defended like that. I genuinely mean there is nothing. You be as vilely racist, misogynist, homophobic and generally nasty as you like, even commit violent crimes (esp. against minorities) and someone will defend it like that.
I'm not saying you are "evil" or whatever, but I am saying, if you say naughty word like that, you should take some time to self-reflect, because it's an incredibly privileged position. One I share, being a tall, well-educated, straight white male, but one I'm aware isn't universal.
If you do something like knowingly attempt to get around a block in order to send insults/abuse to someone, you're a stalker. A low-grade stalker, but that naughty word is is stalking, and creepy. Likewise, if you attack someone personally, that's personal abuse. It doesn't matter if you think it's "funny" or "a schtick", or if your buddies high-five you because they're think it's "funny" or "a schtick", it's still personal abuse.
So yeah, there's that. I strongly suggest you reflect on actions you think are "funny" might appear to other people, and not merely label them "sensitive", for being different to you.
This is all terribly ironic to the point of being blackly humorous in the context of D&D, because essentially what you're writing off as "a schtick" is the same kind of bullying that people used to inflict on D&D nerds back in the day.