The song, and trying to check it out, really impressed me. My take on it: You still perceive some kind of invitation to "know God" or something (maybe you know people of faith who don't act fanatical and mean-spirited?) You tried to check it out to see if it was "for real" – and you got no confirmation that a rationalist is bound to respect.
If you ever do find some spirituality that you can trust, I bet it won't be in any kind of institutional setting.
gently feral