>>723790713
Because he was the first gnostic obviously and the defacto founder of the philosophy millennia before the greekoids. Set believed that man was free, strong, clever and lustful in the wild and it was the evils of Ra and Horus that invented kings and cities and farming which debased man by letting the unfit live. Set wants to break the world so humanity can return to its primordial state.
Which is of course all wrong when you know your Demon the Fallen lore but Set was always the pissant runt of the family anyway.