Yep. Atheism is the absence of religion. The Constitution does not guarantee the absence of religion. If it did it would stand in opposition to religion. The government cannot be atheistic if it is to be constitutional.
Support for atheism as an expression of religion is Marxist doublethink.It is weaponized thought control aimed at creating a rationale for the destruction of religion in the name of religious freedom.
Congress shall make no law....
Have you ever been among those insisting atheism is a religion? That nonsense comes up regularly. At least I won’t see you in that crowd.