Discussing the Bible with other students in your dorm room if you're an RA at college = unconstitutional. Having school children dress up, pray, and fast in accordance with Islamic religious practices = A-OK!
Where's Rod Serling narrating this episode of the Twilight Zone?
Having children recite the Lord's Prayer in the classroom: Unconstitutional.
Having children unwittingly be placed at risk of being considered muslim by reciting the shadada: Perfectly acceptable.