It is difficult to adjust from being a free people to having to live under the rule of cultures that continue to enslave people to this day, and will likely enslave us, once they achieve power.
So the history book. has it about right.
The problem came when US Christianity quit being serious. And this malady didn’t set in overnight. It was a long, slow decline.
Now, I dare any Christian to talk about the work of God as a matter of course and not get sneered at as though (in fact often worse than) if they had been talking about mystic crystal revelations.