This isn't about banning people from wearing their religious merchandise in public. This is banning religious objects from workplaces. More precisely just public workplaces. Of course a secular state should also have secular workplaces. And the way labour rights are personal life can be completely banned from your workplace. Why would religion be treated differently?

No they can not ban you, but they can ban your cross.

If you can't live without your cross, that is on you.

like banning lgbtq people from kissing outside cause it makes others uncomfortable.

We're talking about bans in workplaces here. And I think that your example is fitting. If a workplace can ban people kissing (or wearing a pyjama then it should be allowed to ban religion affiliated clothing as well. That sad, I do be live that in most cases employers shouldn't be allowed to ban these things. If you end up working with your boyfriend and occasionally share a short kiss, that's not going to affect your work and if you're able to do your job in your PJs, then you should be allowed to do so.

The title is false, it's only a judgment in court on whether member states should be allowed to ban such visible signs for public servants or should be deprived of that right.
Yeah, it's one less freedom for the citizens(, and more freedom for the member states), but as someone (still )living in France it's probably for our security or whatever(, this says it's our guarantee for freedom).
It's not worse than when they killed the Church, religion is too important and now it's gone, and our lives ~solely guided by/for virtue/'(the city of )God' with it, they can ban all religions now for all i care, religion's places aren't for the private lives only, it shine's/d' mostly when it's the main pillar of our state. What is supposed to guide us when it's gone, the "realism" of a selfish quest for power ? No consequences for sinning if you're not caught(, since morality is relative/inexistant) ? Looking at "our" feet, satisfied, instead of the humiliating highness of the skies/Sky ?
What is religion if not realising we'll never be enough because our eyes 'look at'/'are searching for' Perfection/Maximum ? We killed our link with God and replaced it with idols, our downfall was announced and our decadence has been visible in the last centuries, poets were the first to disappear, we're so decadent that we don't even realize that people from the past wrote hundreds of time better than us, the scientific explosion was already unstoppable before the XVIIIth century, it isn't linked in any way to our destruction of the benevolent Church.
It'll just be one more deserved downfall after all, i wouldn't cry over it if we didn't try to bring others down with us, the sooner we disappear the better, we've long assumed our dishonesty in the name of "realism" or whatever, we're not christians, nor are we even trying to be, it's for irrealist goody-two-shoes, not for serious people, and i'm fed up currently, there are still a vast majority of good people but i'm angry, hopefully it'll pass like all things, are we even trying to build a better world ? What's our plan/vision ? What am i supposed to support here, capitalist "democracy" with depoliticized citizens and owned private medias, what else ? The "rule of law" that changes according to whoever obtained power/wealth ? What else, our innemurable murderous ventures in every single non-western country in the last 100 years, and irrecoverable cultural annihilation through colonisation before that ? Our propaganda against "unfree" "regimes" needing to be liberated ? What am i supposed to support if we're not even aiming&acting for a better world for all ? It doesn't seem like we're trying, just a nationalistic "America/France/.. first" all around, short-term visions and widespread fear&hate, not any ounce of love towards our designated enemies, no plan for living in a mutual peace, what makes us on the right side if not our pitiful/disdainful lies against our so-called enemies ? If we(sterners) don't support humanity then why would i support us ? Our duty is to make a better world for all, not for our group, neo-colonialism is a shame, and we're lying about it like with so many other things, it's not clever to lie we're so despicable, we should help each other, for real, we should f*cking change, now. If not our downfall is to be hoped for, and the rest of humanity should cheer for it if it means the advent of a better world for all of us.

Shit tier take, with no nuance and a dashing of embedded prejudice.

what bad does it do to other people

Religion is a cancer, the quicker we kill it, the better society will be. In other words, religion does a lot of bad by being propagated.