"The study found that a vast majority of believers, regardless of which religion they followed, thought their faith systems will not collapse if alien intelligence was confirmed. About one-third of the people thought religions other than theirs would be affected while a vast majority of nonreligious people said aliens would change faith systems as a whole."
https://www.ibtimes.com/et-effect-religion-did-jesus-have-incarnations-alien-planets-258921
"Marzulli was quite forthright in his response.
He believes disclosure would collapse the world’s religious systems as we know it.
“It will collapse religion”.
“It will absolutely and utterly collapse the world’s religious systems as we know it. And I’ve written about this extensively”.
“That’s why I call it the coming great deception”."
https://arlhub.com/aliens-and-god-would-ufo-disclosure-collapse-religion/
"The Bible, Koran and other sacred texts of the world's major religions stress God's special concern for humanity and for Earth. So the discovery of aliens — microbes on Mars, say, or signals from an intelligent civilization in another solar system — might seem threatening, by implying that we and our planet aren't all that special.
But our species has had plenty of time to get used to this idea"
https://www.huffpost.com/entry/aliens-god-extraterrestrial-life-religion_n_1624245
If we made contact with aliens, how would religions react?
https://www.bbc.com/future/article/20161215-if-we-made-contact-with-aliens-how-would-religions-react
Vatican: It's OK for Catholics to Believe in Aliens
https://www.foxnews.com/story/vatican-its-ok-for-catholics-to-believe-in-aliens