Yowzah.
Genie is outta the bottle.
RWB finds this "contrary to God's word" and I can understand why, if one prefers a literalist approach to the Bible. Perhaps if the Pew people had phoned as many Laestadians as Jehovah Witnesses (the only group with a majority claiming exclusive truth), the numbers might have changed a bit.
But maybe not.
Clearly, most folks in the 21st century have experienced, seen and/or read too much about other religions to be seduced by claims of exceptionalism.
Some baffled commentators have wondered whether survey respondents actually intended to say that "many denominations (Christian denominations) can lead to eternal life." Hmmmm. I may overestimate the average American's intelligence, but I think most folks know the difference between religion and denomination. Don't you?