[3] Kalbitz was a member of various extremist right-wing organisations before he entered the newly founded AfD in 2013.

[4] In May 2020, Kalbitz was removed as Brandenburg Landtag chairman by the party leadership after he was accused of concealing ties to far-right extremist groups.

[5] Also in May, the AfD annulled the membership of Kalbitz, who in response vowed to "exhaust all legal options" to overrule the decision.

[6] In an interview the same month, co-spokesman of the AfD Jörg Meuthen emphasized that the decision had been made on legal rather than political grounds.

[8][9] He has participated in Pegida rallies in the early 2020s alongside Björn Höcke among others, both before and after he was expelled from the AfD.