The Hermetic Order of the Golden Dawn?

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Somebody in mylot community had offered me this group (i don't know what exactly it is). But here's my problem, is it safe? or like aren't they worshiping some evil entity or something, coz they're website is really creepy. It's not like im judging them but im just being careful of what im being with. If you have any informations of them please tell me some.