It doesn't need to. The Federal Government, nor the States, are allowed to established a state religion. It is an Individual right. Individuals may practice their respective religion; but they may not use the coercive force of government to force others into their religion.
This simple concept is old, born of European religious warfare. I can give you the history, but it involves the relationship of New Netherland & New England when their various religious sects arrived, and found that they decided they could rely on one another regardless of their respective religion, instead of killing each other. The history would be, for this thread, far off topic. Take it up at Old Dudes, and I'll try to respond. With footnotes.
If you will respect me and my right to my beliefs, I will in turn respect yours.