In the early 2000s, his music and public image were widely associated with anarchism and proletarian activism and he made a name for himself by performing in illegal parties, political protests and even riots.
A number of collaborations followed and he appeared in mixtapes and compilations with notable tracks like "Mitä sä tiedät" and "Vaan sil on väliä".
In May 2007, Panama Rayon and Laineen Kasper reproduced and rereleased Julma-Henri's Al-Qaida Finland on Colin Records in Helsinki with great success.
In January 2008, an all-Finland "Support Al-Qaida Finland Tour" was organized assisted by a number of rap and hip hop acts.
Based on this success, he released in December 2008 the mixtape SRJTNT Vol 1 criticizing commercialization of rap.
The follow-up album "HENRI" with 17 tracks from Julma-Henri & RPK in February 2013 produced another music video "Pala".
2[3] as a follow-up to his successful SRJTNT Vol 1 touching subjects of personal growth, recovery and hope from society's ills.
The album was produced by DJ Polarsoul and a number of artists contributed including Asa, Jontti, Juju, Konna, RPK, Super Janne, C-star, Akli ja Joska.
Three music videos were released: "Punainen", "Radio Jihad" and "Kauppaan kauppaan" As early as July 2011, and prior to Radio Jihad... release by Julma-Henri, RPK announced on Bassoradio that he was collaborating with Julma-Henri on a brand new project called Eurocrack and that an album was in the offing.