What do you think of Joyofsatan.org? They follow the Greek Gods and they’re the largest Hellenic Pagan group in the world.
This post turned out way longer than I anticipated. Here's a quick TL;DR- A quick glance around the linked site showed me no mention of Hellenic paganism (or any Hellenic gods), nor did a search through the forums. These are satanists, not Hellenic pagans. It even says so in their name.
So I'm going to answer this with the assumption of good faith. I poked around their website and it was... interesting. They seem to really hate x-iantiy, and I mean... good for them? The layout was a bit confusing, but I honestly looked around as much as I could and saw no mention of the Hellenic pantheon or indeed ANY of the Hellenic gods. Plenty of mention of demons and devils and whatnot but none about my gods.
Giving it the benefit of the doubt I even went to check the forums linked on the front page and wow! I really wish I hadn't. LOTS of blatant antisemitism, "new world order" nonsense (which, for the uninformed, is (neo?)nazi nonsense), and attempts to scare people away from taking the vaccine. I even saw a guy with a hitler icon- standing in front of a flag and looking very patriotic. I wanted to think at first maybe this was a loud minority but some of the people I saw posting seemed to be popular members of the community. Of course its hard to tell from a quick look but it seems pretty clear to me where this community stands.
Still, assuming good faith here. But, anon, I really, really don't think these people are worshipers of the Hellenic gods. Even if they suddenly all agreed no, actually, they believe in and worship Zeus and his kin, the way they talk about Jewish people, the way they attack trans people, the way they try to convince others to leave themselves vulnerable- it goes directly against Xenia (@/medeatheewitch wrote a nice post about Xenia and how to properly worship the Hellenic gods you must be anti-racist and anti-fascist that you can read here). They could claim to be Hellenic polytheists all they want, their stances show their true colors. They are not the sort of people I would allow in my spaces and honestly trying to say these people are Hellenic pagans seems insulting.
These are not Hellenic pagans. I see no attempts from them to claim to be Hellenic pagans. These are satanists, and a rather shitty bunch at that. They seem to be worse than a lot of Christians I know, and they do nothing but give satanists a bad name- something x-ians probably appreciate.