[Stoat]

"The policy recognises that it is not practical for some religious symbols - such as turbans and hijabs - to be worn underneath the uniform. This is purely a question of practicality..."

"...we don't want to be practically beheaded."

Yes, I'm guessing that at least part of the British Airways decision hinges upon the fact that there would be widespread rioting and a focused series of bombings directed at British Airways if they were to equally ban Muslim religious symbols.  They know that Christians won't cause them such troubles.....

"The policy recognises that it is not practical for some religious symbols - such as turbans and hijabs - to be worn underneath the uniform. This is purely a question of practicality..."

"...we don't want to be practically beheaded."

[Slings and Arrows]

Got it in one.