>Shiva → Rudra → Cernunnos or pan → Satan or Moloch
Moses depicted with horns also. Judaism (old testament) has traditions stemming from Egyptian and Mesopotamian pantheons. All cultures ascribe different names and backstories to different aspects of the same phenomena, witnessed in Australia, India, Egypt, Europe, America, etc. It's a mistake to consider this iconography abjectly evil (or Satanic). Literally every religion and metaphysical tradition on Earth shares this imagery.
Yeah, I think [they] follow some perverse Machiavellian/Nietzschean philosophy of beyond good & evil ruthlessness, bound by black-mail acts of extreme transgression against the most fundamental basic human compassion & decency.
The wizards & warlocks fighting to keep powerful knowledge out of the hands of dark forces know and practice all the ancient esoteric mystery school techniques (Kundalini meditation, initiation steps to climb ranks, etc) Infiltration of these schools of teaching by bad actors is inevitable, leading to the widespread demonization by mainstream religious authorities to try and prevent your average person from looking into these topics. It's much easier to keep people in the dark by telling them they'll go to hell for even pursuing understanding of this reality.
If nuclear weapons are a real thing, there's a reason they don't just publish open source plans on how to build them. This is why secret societies and esoteric schools ostensibly exist, to keep the powerful knowledge secret. Unfortunately it's usually psychopaths and those inclined to transgress who are always attracted to things that are forbidden.