If you go back far enough and get a wider enough picture of history, we have let go of many things that follow a religious narrative. We don't burn witches anymore. Most people would consider that barbaric. We don't sacrifice human beings, which was a religious act practiced by numerous cultures on this planet.
In the family, in interpersonal relationships, even in friendship, faith is tremendously important. If you have a partner who you believe is a good person, then it is your duty to have faith in them until the end, despite the fact that they might have done some bad things. And you have to support and believe in your children.
Folk music usually has an emphasis on the lyrics and melody. And those lyrics are usually relevant in some way. And it's populist in scope, which is also true of Bad Religion. So it's more meant to draw some parallels between the two. And I think even my voice and my delivery can be thought of as a little bit folky.
I have great hope and faith, but it's a humanistic faith based in facts; you have to believe that facts exist. We can all arrive at the same facts if we engage in the process of experimentation, observation, and verification, which can solve more of the world's major problems than a debate over whether God does or doesn't exist.