Not happening. Over 70% of the American population identifies as Christian. Most presidents have sworn their oath of a Bible. We added "In God We Trust" on our money about a century and a half ago, and "Under God," to our pledge about 70 years ago. The Vice President elect describes himself as a "Christian. Conservative. Republican. In that order." There is no truth to what you speak.
In certain circumstances, I could see having any jewelry being a court martial offense, but there is no truth in that when it comes to general service. They even have chaplains, and atheist soldiers have complained about feeling pressured, and even disciplined, for not attending Christian events.
That's not happening.
I live in a very rural area, and within just a few miles of 10 or so churches. Along one stretch of highway, there is literally one church after another after another after another, and they are littered throughout the town.
They hardly teach anything about Zeus, not really much more than that he was the supreme deity of the ancient Greeks.
Bull. On the rare occasion I'm watching TV, Christianity is all over the place.
If you're not allowed to write it, how are you allowed to write it? How are the books you read published?
Lawsuit demands US remove 'In God We Trust' from money