New Atheism never really cared all that much about theism or even Christianity, but politics. That much was obvious years ago.
One reason it died off was because of its political failures and risks, and the realization that the political goals they desired could be achieved without advocating for atheism explicitly.
New Atheism isn't really necessary against a Catholic Church where James Martin is celebrated. Or, for that matter, Barron.
Of course you still have some dedicated atheists who thought that New Atheism was really all about atheism. But who's surprised that a belief system legendary for members who can't read social cues wouldn't figure that out?