Buddhism (not the Hollywood version)

Buddhism has become popular in the US in recent years, largely because of the influence of several Hollywood stars. However, what they espouse is just a watered-down, Americanized version.

It's not just a matter of having more good karma than bad; in Buddhism's various Asian forms, there's no difference between "good" and "bad" karma. All karma will keep a soul trapped in a cycle of death and rebirth. After sometimes millions of these rebirths, the soul may reach Nirvana, which is a state of perfect nothingness into which the soul is irrevocably dissolved.

Millions of years of pain followed by nonexistence: that's Buddhism in a nutshell. It's a philosophy of death, not a set of feel-good beliefs designed for rich white people. And it's completely opposed to Christianity.