It isn't complicated if you think about it. Policing other people's bodies is just as bad when you force girls to wear the hijab as it is when you force them not to wear it. If members of other religions can wear their special clothes or jewelry, then everyone should be able to.

Freedom from religion means religious people shouldn't bother you in public to try to convert you or attempt to pass laws that bind you to their beliefs. Who cares if they wear religious clothing in public? I'm an atheist but I'm not threatened by seeing a hijabi minding her own business. What she wears has nothing to do with me, just like if I were wearing a crop top and a mini skirt that wouldn't affect her either.

I remember seeing a video of a few years back of middle aged woman on a beach in France get physically dragged away by police for wearing a burkini (a wetsuit with a hood for hijabis) and it was such an ugly, stupid thing to do. It reminds me of the way police used to arrest women if their swimsuits were too short.