SS, once again you are running off half-cocked. You made an assumption as to the company's reasons for demanding adherence to their dress code, as in they had no reason. Then you treat your assumption as an absolute truth. SS is right, period, all stop, end of argument. And we're expected to go along with it. Is it any wonder people get tired of debating with you?
Again, you need to reread my posts here-I have said repeatedly that if there is a health and safety reason for the clothing, the company will win, and justifiably so. I do think there are reasons to doubt that there is such a justification, considering that these women were working the exact same job for years beforehand, but of course there could be a new reason for compelling different dress in order to maintain safety. And it will (and should) give the employer the right to demand the challenged clothing.
The company almost certainly has valid reasons for demanding adherence to their dress code. Most likely they are safety and health related reasons. These changes occur all the time in the corporate world.
Why did they not demand these behaviors in the past? Because they are entitled, even expected, to upgrade their safety and health related procedures over time. Companies do this constantly to keep from being sued, both by their customers, and by their employees, should there ever be a problem.
This would be where you claim that there must be no case for the Muslim employees, even though we don't have enough facts to say. That isn't what I did, but it is what you accused me of doing.
Given the atmosphere towards Muslims in this country, it is entirely possible that a manager decided to do something that impacts the practice of the faith just because she doesn't like Muslims. That can and does happen-and it should be challenged when it does, just the same as for any other religion in America.