Neither to 'establish', promote OR condemn [anyone's idea of what might constitute a 'religion'] -- It simply is not a function of our Constitutionally-defined secular government.

And (as Peter has said about as simply as I can imagine) - *IT IS IN YOUR HEAD, and THAT is where it should remain: on/in/around/under -- any 'government-funded' LOCALE.

*IT defined:
"One's own collected perceptions of metaphysical kind" - or absence of such perceptions - or Invented-beliefs - or downright Aberrant 'Beliefs', whether benign, malevolent or full-race Cockamamie. Period.

This would remain relevant even were there no local temple, church, cathedral or store-front for conspicuously displaying one's Opinions on the Ineffable: no 'government' can supply "equal time" for every cockamamie mental aberration of individuals constituting the populace (that may be the merely 'practical' underpinning of a sane policy of disengagement which is dictated by the Constitution).

HTH

Ashton