Roeder undertook his legal clerkship at Hamm Higher Regional Court on 1 September 1954, but dropped out of his training to work freelance for MRA.

[9] Roeder's radical right-wing ideology was first noted by the East German Stasi in 1966, but an effort to monitor him was abandoned by the beginning of the 1970s, though a detailed building plan of his residence remained in the archives.

The movement initial focus was opposition to pornography, protesting at erotic conventions, defacing sex work ads and writing petitions against pornographic magazines.

[5][10] Media labelled Roeder a "politclown" for his far-fetched ventures such as writing a letters to foreign leaders, such as Ugandan dictator Idi Amin for help in "restoring the Reich" or Brazilian president Ernesto Geisel to release the detained Nazi war criminal Gustav Wagner with the reason as "to not sully [his] soldier's honor", as well as founding two self-proclaimed "Reichstags" in Regensburg and Flensburg.

In 1980 the Deutsche Aktionsgruppen [de] ("German Action Groups"), a neo-Nazi organisation founded by Roeder, carried out attacks against buildings that housed foreign workers and asylum seekers.

[19] In 1997, the British current affairs program Panorama said that in 1995, Roeder had appeared, by invitation, as a speaker at the German military's officer training academy[5] in Hamburg.

In 1996, Roeder, together with other far-right extremists, perpetrated an attack on an exhibition in Erfurt detailing the role of the Wehrmacht in Nazi Germany, for which he was charged with property damage and fined DM-4,500.

[21] In 1997, Roeder stood as the candidate of the far-right NPD in Stralsund in Mecklenburg-Vorpommern during the parliamentary elections,[5][22] promoting himself as "Chancellor alternative 1998", but was unsuccessful.

[27] A year before his death, Roeder's house was bought by the daughter of Australian Holocaust denier Michèle Renouf and remained in use as a neo-Nazi meeting grounds as late as 2018.