Is it possible to convince a believer to stop believing in bullshit?

The answer is nothing works. Being extremely nice doesn't work. Ridicule doesn't work. Evidence doesn't work. Logic doesn't work.

The problem is the god disease is almost always incurable, and the older the victim gets the less likely he or she will ever be able to grow up.

This what the Magic Jeebus Man has to offer the believers: eternal bliss in a magical heaven that is infested with other insane gullible people just like you.

This is what reality (also known as atheism) has to offer believers: When you drop dead maggots will eat you until there's nothing left. And that's it because there's no magical life after death.

Reality will never be accepted by cowards, and that is why their disease is incurable.