Cool. I don't know why the fuck mdubs kept bringing up that example then. Must be some sort of "gotcha" attempt or something.
This is getting beyond stupid. My very final attempt 'cause I'm running out of ways to repeat myself:
The government should not prevent people from expressing their religious beliefs in a peaceful, legal, non-threatening, non-harmful, unsafe way. People should be all equally free to wear whatever the fuck hat or accessory they want so long as it does not conflict with other rules that are applied to non-religious people. A Christian dude wants to wear a cross at his public government job? A Jewish man wants to wear his yarmulke? A Muslim lady wants to wear a headscarf? Who cares. It doesn't hurt anyone and doesn't interfere with their ability to do their job. A Muslim woman wants to wear a burqa that hides her entire face and body, muffles her voice, and wants to work with the public, and it's been determined that this is inconvenient and interferes with her job? Then she gotta take it off, or we should allow anyone to wear a potato sack over their head.
A Sikh wants to wear a turban under his helmet? If the military says "eh whatever, they're still well-protected and it causes no risk", then cool. If a non-Sikh says "turbans look cool, I wanna wear one too", then they should say "all right, since it's OK for him it's OK for you too" and not "nuh-huh, you don't have a sincere mystical belief about the sacredness of this object, no turban for you". Either the turban is harmful/unsafe, and should be banned for everyone, or it's totally fine, and should be allowed for everyone.
The "justification" should be one that involves harm, safety, or practicality. Does it interfere with your work/activity, does it create health or safety risks, does it actively cause harm? No? Then cool, wear what you want. Yes? Follow the rules like everyone else.
Clear now?