“Greggy’s Cult” — the online sextortion crew taken down by the feds this week — was linked to an international neo-Nazi network that has duped kids into horrific sex acts, self-mutilation and even murder, The Post has learned.

The five alleged ringleaders of the twisted group scoured online gaming sites for vulnerable victims as young as 11, terrorizing them into providing sexually explicit videos and marking their bodies to show their loyalty to the creeps, Brooklyn federal prosecutors said in an indictment unsealed Tuesday.

But that was just the tip of the iceberg, according to the feds and law-enforcement sources.

Members of a loosely-linked wider network of sickos known as “764” — a perverted crew of online predators founded by then-15-year-od Texas dropout Bradley Cadenhead in 20

See Full Page