While some people may find Nox Arcana's music to be disturbing or even satanic, there is no evidence to support the claim that the band is actually a satanic group. In fact, the band members themselves have repeatedly stated that they are not satanists and that their music is simply meant to be enjoyed as entertainment.
It is important to note that there is a difference between dark and satanic music. While some dark music may contain themes of violence or other disturbing topics, it does not necessarily mean that the band or artist is endorsing those views. In the case of Nox Arcana, the band's music is simply meant to create an atmosphere of mystery and suspense.
Ultimately, it is up to each individual to decide whether or not they find Nox Arcana's music to be appropriate. There is no right or wrong answer, and what one person finds disturbing, another may find enjoyable.