The fastest growing religion in the next decade will be Satanism, to the shock and horror of many mainstream Americans. By 2025, more Americans will tell surveys that they are Satanists than Jews or Muslims combined.
There will be several branches of the movement. The first will take it seriously as a religion, while the second will treat Satanism as satire, an opportunity to make fun of established religion and challenge laws that seem to favor religions. The latter group will be the most visible, insisting on their right to place Satanic ornaments next to Christmas trees in public places, standing alongside evangelists at college campus and passing out one copy of Satanic literature for every Bible passed out.
Ultimately, these pranksters will be doing us a favor, as their behavior will cause members of other religions to panic and support laws that make clear the distinction between church and state.