I know that if head scarves are a symbol of gender oppression, then they're bad, and making your employees comply in the name of "when in Rome" is wrong. And arguments like "but you can hide in the hotel" really isn't an answer.
Unfortunately, that is the answer. If the crew member doesn't agree with that, then raise it with the employer... or get a swap... or, sue the employer
We have similar issues here domestically. The province of Aceh, demands that under it's Shariah law, crew landing in its cities are asked to wear "modest uniforms". This changed from earlier demands of "must dress properly according to the local norms and customs when leaving the aircraft"... ie: Even if you never leave the aircraft during the turnaround. Some crew opposed this, and they just swapped their schedules with colleagues whenever they're scheduled to go there... and the airline actually prefer to send "volunteers" there, because they can cut down on the number of "modified uniforms".
With Saudi Arabia, one airline here just give the "Aceh uniform" to the crew on duty there... or, just provide the crew with abbayas before leaving the aircraft.
Homosexual crew? Yeah well, the immigration doesn't go and ask each individual crew "are you gay? tell me the truth!"... They just don't ask...
Gender oppression? Heck some crew actually ASKS to fly there... they're usually known within the company and are usually the target for other crew for swap requests.
Airline related question: When Apartheid was active in South Africa, how did western airlines deal with black employees? Did Delta send African-Americans down to Cape town? Did they tell such employees "just stay in the hotel"?
I can't find examples of crew, but this article shows what it was like for foreign blacks:https://www.businessinsider.com/what-li ... 3-12/?IR=TOn subsequent visits to South Africa as a teenager, I had a British passport. That put me in the peculiar position of being an "honorary white" — meaning I could stay in white hotels and, upon showing my passport, go to restaurants, movie theaters and other places reserved for whites. The exception was South Africa's racially segregated beaches.
This is kinda like in Malaysia going with several chinese Malaysian friends into a non-halal restaurant and the restaurant owner tried to shoo me away (probably he didn't want trouble for feeding a malay looking person non-halal food), until I showed him my passport, and he was happy to have me as a patron.
I got a reverse case for you on this:
[quote="I know that if head scarves are a symbol of gender oppression, then they're bad, and making your employees comply in the name of "when in Rome" is wrong. And arguments like "but you can hide in the hotel" really isn't an answer.[/quote]
There were female cabin crew who wore head scarves when off duty, and they do so out of choice. They actually fought their company to allow them to go on duty with headscarves, citing that it is their right to work with a headscarf... Some companies refused, some companies allowed them.
Some airlines don't allow female cabin crew to wear headscarves, but allow female pilots to do so...
Now... you may see it as bad... but then, just because you see it bad, doesn't mean that there are no women who think it is good.
Now, would you protest dress codes of no bikinis and hotpants when visiting monasteries?