We wouldn't want to live in a nation with no religion. Another Greatest Hit from the past.
Back when I was more active in The Other Group, I used to frequently point out that the "narrative" was wrong. And has been wrong for many years, certainly since the rise of Falwell in 1980.
Fundie Xian churches are not only growing in the mainland US, but in places like Central/South America and Africa. Where they are kicking the butts of the traditional missionary groups like the Catholics and mainstream Protestant churches. Study after study has been done on that, from secular pollsters like Pew as well as religious-leaning researchers like the Barna Group. (Barna Group founder George Barna is a Fundamentalist Xian himself.)
But posts pointing that out were usually ignored. So it got pretty tiresome. As much as I enjoy making boring and repetitive posts...
Here in East Jesus where I live now, there's an interesting corollary to that. Younger people are flocking to the big non-denominational megachurches led by charismatic cult lead...er, preachers.
Those churches have Xian rock bands and kewl multi-media sermons.
The older Baptist, Methodist etc. people hate that stuff. But many are complaining that their kids and grandkids literally will NOT go to church otherwise. So they go to the megachurches.
One megachurch preacher, in his Sunday sermon, referred to Jesus as a "BAMF" (Bad Ass Motherfucker). Heads must have been exploding all over the county when the older folks learned the translation of BAMF.