After his release from allied captivity, he became involved in West German post-war politics.
He set up a political organization entitled the Socialist Reich Party in 1950, which was promptly banned in 1952 for making inflammatory political statements, but not before it had gathered 360,000 supporters in Lower Saxony and Schleswig-Holstein, and won 16 seats in the state parliament.
The Socialist Reich Party also won eight seats in the Parliament of the Free Hanseatic City of Bremen.
The party had received some financing from the Soviet Union, and worked with the Communist Party of Germany, whose aim was the destabilisation of the West German state.
Among the campaigning themes of the Socialist Reich Party was that Holocaust had been an allied propaganda invention, and it  accused the United States of building fake gas chambers and producing bogus news-film footage about concentration camps, that the politics of the Allied-powers created West German state were merely a front for American domination, and that West Germany's puppet status of the United States should be opposed.

With the party banned Remer faced criminal charges from the West German Government as being engaged in activity attempting to re-establish a neo-Nazi political movement.
On the issuing of an arrest warrant for him on these charges, he went into hiding at a chalet belonging to Countess Faber-Castell, an early supporter of the Socialist Reich Party, before fleeing subsequently to Egypt.
There, he served as an advisor to Gamal Abdel Nasser, and worked with other expatriate Germans assisting Arab states with the development of their armed forces.
He was a frequent acquaintance of Johannes von Leers.
In 1956, Remer was reported to be in Damascus, engaging in the arms trade; the Algerian National Liberation Front was one of his customers.

He returned to West Germany in the 1980s, once more involving himself in politics with the setting up of an organization entitled the "German Freedom Movement" (G.F.M.), which advocated the reunification of East and West Germany and the removal of NATO military forces from West German soil.
The G.F.M. was an umbrella organisation for multiple underground Neo-Nazi splinter-groups of varying descriptions, and Remer used it to influence a younger generation of post-war born Germans.

From 1991 to 1994, Remer published a political newsletter entitled the Remer-Depesche, conveying his political philosophy.
Its content led to a court case where he was sentenced to 22 months' imprisonment in October 1992 for incitement of racial hatred by writing and publishing a series of articles stating that the Holocaust was a myth (the political impact of the case upon the Government is discussed in Searle's Wehrmacht Generals).
Remer filed numerous appeals against his conviction, however his complaints of unfairness of trial and violations of freedom of speech were unanimously rejected, ultimately by the European Commission on Human Rights, to which he had taken his case.
In February 1994, having exhausted all means of appeal in the newly united Federal German Republic, he fled to Spain to avoid the prison sentence.
From there he supported the activities internationally of people publicly questioning the historical veracity of the Holocaust, such as Fred Leuchter and Germar Rudolf.
The High Court of Spain ruled against requests made by the German Government for his extradition back to Germany, stating that he had not committed any crimes under Spanish law.

Helmut Friebe, a leader of the Alliance of German Soldiers, had the following to say about Remer: "No judgment will be made here as to whether his decision on 20 July was right or wrong.
But the consequences of his decision were so terrible,... that we old soldiers had expected that a man to whom destiny gave such a burden to carry until the end of his life would recognise this, and would thereafter live quietly and in seclusion.
We, his former comrades, lack any sympathy for the fact that Herr Remer fails to summon up this attitude of self-effacement".
After his release from allied captivity, he became involved in West German post-war politics. He set up a political organization entitled the Socialist Reich Party in 1950, which was promptly banned in 1952 for making inflammatory political statements, but not before it had gathered 360,000 supporters in Lower Saxony and Schleswig-Holstein, and won 16 seats in the state parliament. The Socialist Reich Party also won eight seats in the Parliament of the Free Hanseatic City of Bremen. The party had received some financing from the Soviet Union, and worked with the Communist Party of Germany, whose aim was the destabilisation of the West German state. Among the campaigning themes of the Socialist Reich Party was that Holocaust had been an allied propaganda invention, and it  accused the United States of building fake gas chambers and producing bogus news-film footage about concentration camps, that the politics of the Allied-powers created West German state were merely a front for American domination, and that West Germany's puppet status of the United States should be opposed.
With the party banned Remer faced criminal charges from the West German Government as being engaged in activity attempting to re-establish a neo-Nazi political movement. On the issuing of an arrest warrant for him on these charges, he went into hiding at a chalet belonging to Countess Faber-Castell, an early supporter of the Socialist Reich Party, before fleeing subsequently to Egypt. There, he served as an advisor to Gamal Abdel Nasser, and worked with other expatriate Germans assisting Arab states with the development of their armed forces. He was a frequent acquaintance of Johannes von Leers. In 1956, Remer was reported to be in Damascus, engaging in the arms trade; the Algerian National Liberation Front was one of his customers.
He returned to West Germany in the 1980s, once more involving himself in politics with the setting up of an organization entitled the "German Freedom Movement" (G.F.M.), which advocated the reunification of East and West Germany and the removal of NATO military forces from West German soil. The G.F.M. was an umbrella organisation for multiple underground Neo-Nazi splinter-groups of varying descriptions, and Remer used it to influence a younger generation of post-war born Germans.
From 1991 to 1994, Remer published a political newsletter entitled the Remer-Depesche, conveying his political philosophy. Its content led to a court case where he was sentenced to 22 months' imprisonment in October 1992 for incitement of racial hatred by writing and publishing a series of articles stating that the Holocaust was a myth (the political impact of the case upon the Government is discussed in Searle's Wehrmacht Generals). Remer filed numerous appeals against his conviction, however his complaints of unfairness of trial and violations of freedom of speech were unanimously rejected, ultimately by the European Commission on Human Rights, to which he had taken his case. In February 1994, having exhausted all means of appeal in the newly united Federal German Republic, he fled to Spain to avoid the prison sentence. From there he supported the activities internationally of people publicly questioning the historical veracity of the Holocaust, such as Fred Leuchter and Germar Rudolf. The High Court of Spain ruled against requests made by the German Government for his extradition back to Germany, stating that he had not committed any crimes under Spanish law.
Helmut Friebe, a leader of the Alliance of German Soldiers, had the following to say about Remer: "No judgment will be made here as to whether his decision on 20 July was right or wrong. But the consequences of his decision were so terrible,... that we old soldiers had expected that a man to whom destiny gave such a burden to carry until the end of his life would recognise this, and would thereafter live quietly and in seclusion. We, his former comrades, lack any sympathy for the fact that Herr Remer fails to summon up this attitude of self-effacement".
Otto Ernst Remer