Biggest deal I have with the whole situation is how the children would be raised. I don't know if I could handle having my kids being fed that and I'd imagine that would cause serious issues. I might just be fucked.
I live in Texas and consider myself both anti-religion and anti-football, so I've been through the same thing you have. My only suggestion is to join match.com or similar and just filter based on religion-- that's your "viable" pool right there. It's pretty much your only hope to be honest unless you want to join some MeetUp Atheist group. I used to think hitting on the slutty looking chick with the tramp stamp at the gym would be a safe "non-religious" bet, but then I found out super slutty chicks love Jesus too.
I don't think an atheist could possibly get along with a religious Christian-- their whole view of life is diametrically opposed.
My one effort/interaction with a religious girlfriend at the 3 month mark:
Me: So what would happen if you got pregnant?
Her: Well we would get married obviously
Me: What happened if you found out at 3 months pregnant that the baby had Down's?
Her: Well that would be sad, but we would still have it. If you're trying to imply an abortion that will *never* happen.
Me: You do realize that our lives would be over right? We would have to work until the day we die because the best job our child could ever get would be at Walmart. We'd be 75 years old taking care of a 12 year old in a 40 year old's body. It's the definition of a drain on society.
Her: He/she would be a gift from god and it's not our place to judge.
Me: Maybe the invention of genetic testing to prevent Down's babies was also a gift from God.
Her: *scowl*
Me: Besides essentially raising a child for the rest of our lives, can you imagine the extra costs?
Her: Well I guess you'll have to work extra hard..
Me: Err, Umm, GTFO?