No they can't do whatever they want! Minority or majority. There is law for all.
What bothers me is : "In Europe it's normal for minorities or certain stateless groups to have separate after school classes or even within regular curriculum (it's part of their right to preserve the heritage)."
Do you think minorities deserve classes in they own language? It's debatable question, but maybe I think yes, If its only one class in their mother tongue and that's only if there is enough students to form that one class.
Giving education to every minority in native tongue no matter what are circumstances ... its opening of Pandora's box. Especially in EU today.
I mean I don't know how multicultural is area you living in or grown up, But believe me, my parts (Vršac and surroundings) is highly multicultural for at least hundreds of years. People always live good and in harmony whenever there was no big involvement of politic. And I think they starting to involve now. And things you talking about is one form of it.
So now, in some places we have names of towns or names of government buildings written in up to 10 languages!
Biggest Irony is that in 8 of those 10 language is basically same word!!!
I'm just convinced that things like are not good for anyone.
Perun Is there some names of towns in Cyrillic letter in Croatia? Would you like that Serbian minority in Croatia ask for classes in their mother thong? I would not like or support any of that no way. So I guess i make you clearer what did I meant.
Or maybe I misunderstood you, but I asked for explanation and didn't get one.