[1][2] Sennels was employed as a psychologist at Sønderbro, the secured facility for youth charged with crime in Copenhagen, until 2008.
[4] In 2010, American forensic psychiatrist Michael Welner acknowledged that he in part drew from an interview with Sennels in the case of Omar Khadr, a fifteen-year-old Canadian expatriate living in Afghanistan, who was charged with the killing of U.S. Army medic Christopher Speer at an al-Qaeda safe house in Khost.
"[5] He was also said to be "a Danish psychologist who believes Muslims are raised to be aggressive and that inbreeding has damaged their genes.
[1] At the time he worked as a child psychologist in Copenhagen municipality, and there were calls to have him fired by a local politician and a union.
[6] Sennels stepped down as leader of the group, then named For Frihed, in December 2015 to reassume his membership in the Danish People's Party, which he had left just prior to establishing Pegida Denmark.