Thanks for this. This is exactly the type of material I'm looking for. So let's take a look.

The first thing I notice is that both links refer to the same article written by a single individual, one Ronald Inglehart, who does appear to be a very credentialed scholar.

The next thing I look for is sample size.

Mr. Inglehart says:
“A dozen years ago, my colleague Pippa Norris and I analyzed data on religious trends in 49 countries, including a few subnational territories such as Northern Ireland, from which survey evidence was available from 1981 to 2007 (these countries contained 60 percent of the world’s population).”

This is compared to Pew's survey which says:
“Together, censuses or surveys provided estimates for 175 countries, representing 95% of the world’s population.”
[pewresearch.org]

And Pew's survey does appear to be more recent, but not by much. But the two surveys appear to have come to nearly opposite conclusions, so I search for any communication between the two sources and find that Inglehart spoke at a Pew hosted presentation, clarifying his position:

"It would be dishonest to say there is a global resurgence of religion when there is a lot of evidence, in fact, that in many countries religion clearly is declining. Nevertheless, I would say, as the bottom line, quite clearly, unequivocally, no waffling, there are more people alive today with traditional religious beliefs than ever before in history, and they’re a larger percentage of the world’s population than they were 20 years ago. The World Values Survey data make that really unequivocal. When I was a grad student, I was not at all interested in religion because it was so obvious — all the major intellectuals knew — it was dropping off the map. Why waste your time on something that maybe 20, 30 years from now won’t even be there; so why bother? That was colossally wrong, as we all now know."
[pewresearch.org]

Maybe Pew paid him off!!!

At any rate he agrees with me (and Pew) that the religious percentage of world population is growing. And I agree with him that the nature of religion is changing.

This link takes me to an article titled “U.S. Church Membership Falls Below Majority for First Time”.

@skado sorry, it is not a “worldwide” poll

Apparently you missed the part where person asking for a link said "This is a very specific question. It is not an invitation to post opinion pieces or surveys of isolated pockets of religious decline." It was the second sentence of his post.

Muslim majority countries did not act or react in relation to anything the U.S. did. Rather the U.S. reacted what they allowed.