Ok, I don't want to be tedious, but I ran across a couple of things relatively recently that opened-my-eyes on some very important things, and they also happen to explain why someone might want to be a "Christian-atheist".

Number One,

This guy explains how and why group activities such as singing hymns (the same 20 songs for hundreds of years) and large pot-luck style dinners (feasts) like you often see at Churches and other activities like "giving testimony" by telling your personal story in front of a live (friendly) crowd are evolutionarily and physiologically essential for human mental health and general well-being.

And Number Two,

This guy does kinda the same thing, but with a lot of scientific data.