Sottofasciasemplice was a very interesting project. Alternative music meets neofolk (in the beginning, especially the album "Crociato"), then they moved towards a more electronic sound in recent years. The focus has always been, as happens with these bands, on the lyrics. "Come mai" is a perfect example, and has become something of an anthem in certain circles.
However, in those years it was not impossible to see this type of impromptu collaborations (on the compilation dedicated to Codreanu there were both Sottofasciasemplice and Londinium SPQR, another Italian group from that political area), and Der Blutharsch himself did a split with ZetaZeroAlfa (the CasaPound leader's band).