Let’s get one thing straight.

Humanity is, by its nature, religious.

The OP said that the US is growing less and less Christian... Duh. Anyone who couldn’t see that coming 40 yrs ago has serious isssues.

But we are NOT becoming less religious.

Wokeness is a religion.

Scientistic Materialism is a religion.

We all have to have a narrative we live within which gives coherence to our continued existence; those narratives are religions. Everyone has one, tho some who aren’t so intellectually honest deny they do.

They’re whistling passed the graveyard.