Suomen Sisu proclaims to support the idea of independent nation states, that govern themselves sovereignly, and opposes supranational co-operation, especially the European Union.

Suomen Sisu was established as the Youth Organisation of the Association of Finnish Culture and Identity (Suomalaisuuden Liitto) in 1998, but this affiliation was broken in 2000.

Member of Parliament Jari Vilén asked the police to investigate the issue, but it did not lead to prosecution.

Suomen Sisu was described as a "Nazi spirited" group by the Finnish newspaper Länsiväylä; the association's president deemed the description incorrect and filed a complaint with the Council for Mass Media in Finland.

[4] The website of Suomen Sisu has promoted books by Nazis and neo-Nazis such as Alfred Rosenberg, George Lincoln Rockwell and David Duke.