It seems to me that any society has three choices in dealing with this small question of religion.
The first is to elevate an approved faith to the point of dominant status over all other belief systems. It is formally woven into the legal, political and social system, every sphere of public life and as much of private life as possible. An extreme example might be Afghanistan under the Taleban; a more moderate one, Britain at earlier and less enlightened times in its history.
The second option is, in many ways, equal and opposite. It is based on the view that faith is all dangerous, divisive mumbo-jumbo. No good can come of it so, if it cannot be eradicated altogether, it must be chased from the public sphere, confined to a place of worship or the home, upstairs under the bed with the pornography. An extreme example would be Stalin’s Russia; a more moderate one, the French Republic.
If we really believe in freedom of thought, conscience and religion, this must include the right to the faith or belief of one’s choice, the right to no faith and to be a heretic. Proportionate limits on this precious liberty don’t arise because a minority causes irritation or even offence. We interfere when someone is harming others, or in the workplace when, for instance, their faith or clothing prevents them doing their job.
This seems a sensible approach. Religious beliefs should have no special place in a secular society but they should not be specifically opposed by the state either. Obviously I believe that private organisations should have the right to allow or disallow any symbols they wish, but their behaviour has still been extremely foolish.