I was definitely joking :-)
I guess it is the difference between selling a bad product with the intent of exploiting people and just selling a good product to a market one has little affinity with.
As an atheist I do not feel contempt or superiority with anyone religious - indeed most religious people I know I respect greatly for their integrity and community minded committment. (Most religious people whom I disrespect I would disrespect if they were atheists too - it is I guess "by their actions you will know them")
Put it a different way - this project looks like an excellent product / saas to sell to the Mosque and Synagogue market as well as Protestant Church market. I expect there are some hard coded assumptions that would need pulling out to a config file, but just as I see common behaviour between religions as decent, honest, community minded and "good" I think the common needs of decent honest community minded organisations seem to be met by this product.
As an atheist I would have no qualms selling this to different markets. I suspect however that the story behind this (7 years, Christian coder) is too good for one market and a disability in the others. Would be interesting to know.
Anyway, good luck and I still suggest partnering with a hustler to build a non-profit org to sell saas on the back of this