You cannot change anyone's mind. They have to change for themselves, it's useless, hopeless. Forget about it. All anyone in this existence has are ideas, about the world, about existence... none of us have all the answers. Some of us pretend to, but it is far too easy to see past those who pretend. The question is, will we confront it in person... or just pretend to go along with it...
Real life, is so much different than the internet. We actually have to apply ourselves, and confront one another on a personal basis, rather than typing something out thousands of miles away from one another.
You can tell though, the ones who won't change. They are the ones who don't want to talk about it, or refuse to...
Either way, they don't know any more about this existence than we do. The only difference between believers and us, is that we are not required to pretend we know something... when we really don't.
We have a special freedom, we are unique in a sense... that those few of us who refuse to pretend to know something that we do not... we can be honest with ourselves.
And that... that, is the key to happiness. To be honest with ourselves.
Anyone else trying to find happiness in a different way will be sorely disappointed. The search will go on, and on forever... until you find yourself, looking... staring at yourself in the mirror, only to realize one day... You are just a shadow, a mirage, just a figment of your own mind. And when that day comes, you will realize just how much you you cannot be certain of in this existence.
But alas, do not give up, because you still have you, and the decisions you make, which is EVERYTHING.