The thing is, I don't have an answer to all of these questions.

On the other hand, I know pagan bands with songs about "Killing all the christian heathens coming to colonize scandinavia". About "Crushing the roman christians coming to take germanic women with their fairy tales of a weak god". (BTW, this is explicitly not about german nationalism. There are nazis abusing these terms of skandinavian/germanic origins, many of them, but this isn't part of that). Those are what I meant when I said: I'm not sure if I want to discuss those with a christian I don't necessarily trust. Because face it, norse mythology was colonized by roman christians. maybe for good, maybe not, I don't know.

And in another direction, a lot of metal / heavy metal / rock imagery is based around pushing and prodding and poking christians. Not just subtly. They thrived on this to establish themself as counter-culture. "You are Christians. We are sons of satan. We listen to the other music." For those, I can very much find a foundation in christian religion. Like, look at denmark. Burning a stack of paper shouldn't be a big thing, but now they are creating laws against burning the Koran. Not sure how I feel about this.

In that light, I'd very much be in favor of a school uniform, or a specification of unicolor shirts / t-shirts without imagery, I have to say. Concessions are bound to be abused in every way, with that hat on.

The sad thing to me personally is: IMO, we should embrace diversity. Someone wearing a weird cloth on top of their hair should be a source of curiosity. It should be an exposure to something new and an option to grow and reflect and to learn they are just a person, just a bit different. Like the first time you try to cook for a vegetarian, a vegan, or try to date a lesbian.