The difference here is that skin color and gender aren’t a choice, whereas wearing a religious sign, just like wearing a sign of your political allegiance, is a choice.
Unless you tell me that wearing a kippah isn’t a choice for the wearer, which would be in direct violation of our charter or rights and freedom…
The people concerned also get affected if their religious sign can’t be worn because of uniforms, they don’t go and sue employers that tell them they can’t wear a safety hat over a turban or that they can’t drive a transport van while wearing a burqa that hinders their view. If their sign is so important that they can’t satisfy the criterias for the job they just go work in another field and that’s it.
The State doesn’t have to guarantee access to jobs to people who don’t fit the criterias for the job, including the responsibility to appear neutral. The perfect State employee in a position of authority would be a robot that looks nothing like a human with a gender neutral voice, since we can’t have that we’re stuck telling people that they need to adopt a neutral appearance to work certain jobs or they can go do the equivalent job in the private sector if it exists or they can take other tasks which don’t put them in a position of authority, including some very good jobs for the State!