Socially-conditioned belief

A common objection to Christianity faith is that Christian faith is just a historical accident. Most Christians were raised in a country where that's the preferred religious option. Of they were born to Christian parents, which predisposes them to be Christian. 

But an obvious problem with this objection is that you could say the same thing about atheism. Folks are more likely to be atheists if their social conditioning is secular.

In addition, the objection proves too much. For instance, I have many scientific beliefs because I was raised in a scientific culture. If I was raised in a prescientific culture, I wouldn't have these beliefs. But does that undermine belief in science?