His activism, which included unabashed support of Nazi Germany and self-styled Reichstag meetings, are generally considered an early precursor to the Reichsbürger movement.
In autumn 1939, Christophersen enlisted in the Wehrmacht to serve as a private on the Western Front during World War II, but he was removed from combat duty the following year due to a facial injury that left him with a "children's fist-sized" indentation at the nasal root.
Staff identified Christophersen as a supervisor at the Russian dandelion greenhouses, where he frequently interacted with the roughly 300 female prisoners labouring as horticulturists, who had nicknamed him "Locher" ("hole puncher").
[9][10] In a memoir, Christophersen wrote that he "experienced no atrocities or executions and neither [noticed] gas chambers nor flames from crematorium chimneys", describing his own stay as "pleasant".
Despite its small readership of some 2000 and locally limited circulation, the magazine was sold in 1968 on 17 June to Gerhard Frey, who published it as part of his extreme right newspaper Deutsche National-Zeitung.
In his writings, Christophersen denounced the German constitution, accused guest workers of "weaponizing their natural fertility" and called for the establishment of a Fourth Reich.
[2] Throughout the 1960s and 1970s, he forged close contacts, both domestically and internationally, with other proponents of the "Auschwitz lie" such as Udo Walendy, Robert Faurisson, David Irving, Otto Ernst Remer, and Florentine Rost van Tonningen, and with Stille Hilfe[15] ("Silent Help"), an organisation assisting neo-Nazi activists.
In July 1972, Christophersen gained national attention after he publicly dumped a truckload of manure at the gates of the Fridericianum in Kassel to protest the documenta 5 exhibit being hosted there.
He criticised the display as "western decadence" and a "waste of government funds", proclaiming his opposition to "the public advancement of women" and advertised his brochure Die Bauernschaft.
He had received a notice by city officials that such a gathering would be forbidden due to its unconstitutional nature, but Christophersen claimed that he wanted to wait until the rally began to inform his followers.
During the rally, Christophersen proclaimed that the current administration was illegitimate and that he considered Karl Dönitz, who was the head of state for less than a month following Hitler's suicide before surrending to the Allied Forces in Flensburg, the true reigning leader.
[2] That same month, along with a circle of around 50 others, including Roedner, Christophersen hosted a meeting in a pub in Padborg, a Danish town close to the Schleswig-Holstein border, to avoid trouble with German authorities.
The group left after Roedner proclaimed that "we take notice that Denmark also does not have freedom of speech", calling the country "averse to anti-terror measures" and "easily buckled under media pressure".
His trial was held in October 1983, where he was sentenced to a total of seventeen months imprisonment for Volksverhetzung and denigration of the memory of deceased persons, (related to guest writings by known neo-Nazis and a self-written article that called 20 July plot organiser Claus von Stauffenberg a traitor).The hearing was picketed by supporters of Kühnen's Action Front of National Socialists/National Activists.
[4] In 1986, after a warrant was issued for his arrest related to incitement of violence and racial hatred, Christophersen fled the country to Kollund [da; de] in Denmark, receiving financial backing from regional neo-Nazi organisations.
[28] Along with Christophersen's own writings, that book also contains further contributions and forewords from other Holocaust deniers, including the former lawyer and convicted violent criminal Manfred Roeder (classified as a terrorist in Germany)[29] and the former judge Wilhelm Stäglich.