The advent of Bolshevik, Fascist and National Socialist regimes in Russia and Europe successively between 1917 and 1933 led some contemporary intelle… - Michael Burleigh

Between 1939 and 1945 the Nazis systematically murdered as many as 200,000 mentally ill or physically disabled people whom they stigmatised as 'life unworthy of life'. This covert and complex series of operations was known as the ‘euthanasia programme.’

The Social Democrats were adamant that they did not want ‘a deformed socialism that creates a mass prison’: ‘we want to liberate, not oppress.’ The Stalinised Communists, since 1929 committed to their ‘social fascists’ line, were convinced that the ‘Nazis and Social Democrats stand on the foundation of capitalist private property and were slaves of capital and enemies of the workers… According to the Stalinist view that the most insidious enemy were immediately to the left – which had Stalin’s ( NKVD) imposing discipline on Trotskyites with a bullet to the head – leftist Social Democrats were the most dangerous of the ‘social fascists.’

The Austrian Catholic newspaper Volkswohl even parodied life in a future Nazi state in a manner that seems extraordinarily prescient. Every newborn baby’s hereditary history would be checked by a Racial-Hygienic Institute; the unfit or sickly would be sterilised or killed; dedicated ‘Aryan’ Catholics would be persecuted: ‘The demonic cries out from this movement; masses of the tempted go to their doom under the Satan’s sun. If we Catholics want to save ourselves, then I can never be in a pact with these forces.’