In 1980, the 17-year-old Weidner founded the band Böhse Onkelz ("Evil Uncles") with Kevin Russell and Peter "Pe" Schorowsky.

Conflicts with Punks and Antifascists nationwide, local Turkish residents and the increasing right-wing shift of the skinhead movement were reflected in the band's music, leading to xenophobic lyrics and the band's subsequent popularity with those movements.

Weidner remained faithful to his influences both musically and in his lifestyle, as expressed in his writings and interviews with the press.

This conflict with the media culminated in songs such as "Meister der Lügen" (Master of Lies) or "Danke für nichts" (Thanks for Nothing).

Weidner's refusal to give interviews outside of the music press at that time is part of the "mythos Onkelz".

In 1993, at MTV's "Free Your Mind" event, Weidner and Campino (of the band Die Toten Hosen) discussed the influence of xenophobia on their music and their fans.

On 15 May 2006, Weidner (along with Daniel Wirtz of Sub7even) released the songs Unser Stadion – Unsere Regeln ("Our Stadium – Our Rules") and Gewinnen kann jeder ("Anyone Can Win") under the band name Nordend Antistars as arena anthems for the 2006 FIFA World Cup.

[2] For his live performance, Weidner's band consisted of Rupert Keplinger, Dirk Czuya, Henning Menke and JC Dwyer.