Hi Vote Cthulhu,
I'm sorry the church sign didn't strike you as a bit humorous. Humor and humorous situations have been, and continue to be, a great help to me on the road to healing. Sometimes, honestly, when things overwhelm me and I feel like crying and maybe completely losing it, laughing can get me back to that safe place in my mind.
But I think humor, like art, is in the eye of the beholder. So if the sign wasn't funny to you then the sign wasn't funny. I guess it was funny to me because some church groups take themselves entirely too seriously; and it's nice to see this other side.
One of the funniest quips I've ever heard is the insomniac atheist with dyslexia who often stayed awake at night wondering if there is a dog. But I'm not sure an atheist would think it as funny as I do. So, different people, different sense of humor and It's hard to know what will offend, what will amuse.