Religion is dying
Before you write the epitaph of religion you are going to have to come to terms with the fact that the demographics heavily favor the religious.
Having more children doesn't mean shit if those children become Atheists, now does it?
If Christians are out-breeding Atheists as you claim, why is there a HUGE rise in Atheism lately? Can you explain?
Your propaganda is so easily debunked a child could do it... hell, national geographic debunked your nonsense:
http://news.nationalgeographic.com/2016/04/160422-atheism-agnostic-secular-nones-rising-religion/