You put "less than Christian" in quotes - does that appear somewhere in the story? After your strong response, I went back to try to find the source of your anger. It may be that in the first chart, the author uses the label "Christians" over what appear to be the Evangelical statistics. It is my feeling that this may simply be a poor choice of titling rather than evidence of any bias the author may have. I did not get the impression that he was saying that only Evengelicals are truly Christian.
But even if he was (which I would personally disagree with) the main point of my posting this is to show the growth rate of evangelical Christianity to refute the claim that the numbers are decreasing. That is the context into which I posted this to the thread - rather than some sort of statement on who is truly Christian.
Or how you can extrapolate increasing numbers in faiths - including nonchristian ones - as somehow leading to "everyone" being Christian by 2041?
I have to believe that the author is being facetious when he makes reference to 2041. It might also simply be a mechanism to illustrate the speed of the current growth rate.
I picked up on the main point and I'm not even an actuary.