While i support it for government employees in schools or other jobs with the public, i think we also need to look at the role of the attire. Priests and Nunns wear specific attire to their religious role.

It is not day to day clothing for normal people. for the Abbaya, or we had the same discussion in Germany for Hijab or any scarf around the head i always found it absurd since my areligious grandmother wore a scarf covering her head all the time and she preffered clothing that weren't emphasizing her body shape. For day to day clothing or accessoires it becomes muddled quickly. is the cross on the wristlet a sign of religious affiliation, or just looking cute? Are the semi-moon earrings only worn by muslims, or does Anna-Sophia just like how it emphasizes her face? What about Marcs metal-band shirt with a cross on it? The only surefire way to "solve" it, would be to define a mandatory school uniform.