You just don't understand the Constitution and the meaning of Congress shall make no law respecting an establishment of religion.

In other words the power of the state does not align behind a single religion. If it did there would still be compulsory Christian school prayer in public schools.

And because it doesn't allow that there will be no Muslim call to prayer over the intercom either. See how it works?

Religions tests are not allowed for public office and appointments, either.