On the face of it the face of it you might think that the European Court of Justice ruling "An internal rule of an undertaking which prohibits the visible wearing of any political, philosophical or religious sign does not constitute direct discrimination" was fair and equal. As long as applies to it applies to everything right?
Firstly even if you don't believe in a religion then I'm sure you can understand the concepts behind them. There are people who sincerely think that the consequences in the long term (damnation) are worse than now (starvation).
So you can't be convinced by that, next is there are some that even if they decide they think employment is more important than religion can't do anything about it. Culturally they'll be stopped by family, spouses, elders or other leaders. This will be by some form of real or threatened violence. It may not be what we want for people, but it is reality and realistically unfixable.
Next if you look at the context of this against other rules and laws in Europe that have come out over the last few years, this is obviously part of rising islamophobia. It may as much about turbans, yarmulkes, crosses, political party insignia and cameos of epistemologists but look at the coverage everyone knows what it is really about.
“However, in the absence of such a rule, the willingness of an employer to take account of the wishes of a customer no longer to have the employer's services provided by a worker wearing an Islamic headscarf cannot be considered an occupational requirement that could rule out discrimination.”
means that when a company starts pandering to racists it has to screw over the whole workforce.
 Doesn't really matter which. If your religion says that bad things will happen, eternal damnation for example, if you don't follow the rules, you should be able to understand someone else's does also. If you can't muster up such basic empathy begone with you.