They don't DEMAND you belief in them, else go to hell / get isolated by your family.

That is blatantly untrue. See: https://en.wikipedia.org/wiki/Filial_piety#Developments_in_modern_society. People of any culture will react negatively when cultural values or traditions they hold dear are ignored or disrespected by their children. This is why homophobia is still going strong in predominantly atheists societies like China and Japan, for example.

Is anybody discussing arrest in the current situation? You're pulling a classic reductio ad absurdum.

Yes, that's the point. The only difference between banning niqab in schools and my example is extent; fundamentally they're both using state violence to enforce conformity in child rearing, which is bad no matter how much or little of it you do.

This is not an attempt to ban parents passing their religion on to their kids, it's merely preventing them from doing so in school,

So only rightthink should be practiced at schools? There is no qualifier you could add to this idea that won't make it fucked up, because imposing rightthink via state violence is bad no matter where you do it.

You've made a lot of claims yourself, feel free to back them up any time.

If you can only respond with "no u," you should really reevaluate your position. Also I'll back up any claim you want me to, but you'll need to be more specific than that.

We're talking about Sweden, and last I checked they did not force girls to wear skirts. For the record I'm against forced uniform segregation by gender.

First this is Finland in the OP. Second, you ignored the second half of that part.