Why does religion continue to grow?

[Endgame]

According to Pew Research, religion will continue to grow worldwide through 2050. 

• Christianity will grow numerically (+800,000,000), but stay the same as a % of the world's population: 31.4% (the largest)
  
• Muslims will grow in both categories and should garner about 29.7% of the world's population by 2050
  
• Unaffiliated (including atheists and agnostics) grows a little numerically, but goes down from 16.4% to 13.2% of the world's population.
  

http://www.pewforum.org/2015/04/02/relig...2010-2050/

In spite of your superior intellect, logic, and scientific proof to the contrary, your message that God is dead does not seem to be getting out. 

I'm interested to hear your theories of why by 2050, contrary to 300 years of predictions, almost 3,000,000,000 Christians will be sitting in pews around the world praying for the salvation of your grand kids. 

I probably disagree with the Pew Research.
Although a lot of people refer to themselves as Christians, the Bible knowledge of today's generation is so poor the Christian identity would mainly be revealed in Politics or going to an occasional church wedding or a baptism.
And since Politics never brings the best in any religion, Christianity would continue in name only.

Then many would get disappointed in Christianity and do something else instead.