Sikhs have a custom they must not cut their hair or beards and must wear a turban. However, they have elevated this to an overwhelming life-and-death compulsion that they demand non-Sikhs accommodate:

Obviously Sikhs have the right to do as they please when they don’t interfere with others. I think non-Sikhs should humour Sikhs any time they can easily accommodate them. However, I don’t think Sikhs have the right to demand others inconvenience themselves to honour this silly superstition. Sikhs should never be granted exemptions to criminal law based on religious belief. If we decide to give them some exemption, then everyone should get it.

~ Roedy (1948-02-04 age:70)