Obviously the reason that fascism is something people in the modern world care about is because it's a way of characterizing present-day political policies as violent and gravely immoral, akin to the violent and gravely immoral policies that the historical Nazi party of Germany did. And obviously, everyone has an interest in characterizing the policies of their political enemies as fascist, and fighting claims from their enemies that their own policies count as fascism.
I ctrl-F'd this article and didn't find one mention of words like "migrant", "white", "refugee", "muslim", "of color", "racism", "anti-Semitism", etc. And what that tells me is that this LARP that tries to teach kids that fascism is bad (and that is explicitly concerned about the possibility of "accidentally teaching teens that fascism is actually awesome.") is not even attempting to address the single most important contemporary political issue that makes fascism salient; namely how should white societies deal with the ostensible problems caused by nonwhite communities living in close proximity to them - and are there ways of dealing with these problems that are so gravely immoral that it is morally important to stop them with antifascist violence?
After all, what's the most important thing the historical Nazis did? The genocide of European Jews because of their ostensible racial threat to Aryans, i.e. whites.
I looked at the pictures of this LARP and did not notice a single nonwhite person. Maybe the nonwhite student and faculty population at this Danish boarding school is extremely low. In my country, this is the very first thing that someone seeking to characterize the boarding school itself as fascist would point out. Are they correct? Is Danish society itself fascist for being a society where no one raises this question in an article describing an ostensible attempt to teach teenagers in school that fascism is bad?