My aspie daughter has a special interest I worry is problematic

My (52F) daughter (17F) is autistic and obsessed with the Second World War. She has a particular special interest in Vichy France. I do not know how she got this obsession as we live in New Zealand.

She has a portrait of Marshal Phillipe Pétain and the flag of Vichy France decorating her room. She tells me that she is not a fascist but loves the history. She sometimes calls old peoples homes in France (I don’t know how she gets the numbers?) and asks if there are any residents who were alive during the German occupation of France who would like to talk to her. She is fluent in French, completely self taught, which I am proud of her for.

I love that she’s interested in History and French culture but I’m worried that people might get the wrong idea about her as she always talks about Vichy France and Marshal Phillipe Pétain. Over Christmas I witnessed this as she talked about Vichy France non-stop for a whole hour to distant relatives.

I don’t want to discourage her passion, but I personally dislike that she has propaganda from a fascist regime in her bedroom. Am I overreacting? I don’t know what to do, I don’t want to interfere with her passion for history but at the same time I find it strange that a 17 year old girl has a portrait of a controversial French leader in her bedroom.