Ironically, you might be able to get a Sizzi-wank by wanking
not Fascism or Nazism, but
Gandhi.
Maybe, London listens to him early on in his career, when he espoused the belief that all Indo-European peoples, from Delhi to London, were equal to each other and superior to everyone else; Great Britain and India become equals in the Empire, and Mussolini joins the Allies, leading to the survival of Fascism (but not Nazism) as a viable ideology.
Even though India and the United Kingdom keep their dual monarchy, they have to let go of most of the colonies due to financial concerns; most other European countries do the same, but the flame of pan-Indo-Europeanism lit by Gandhi allows for the birth of an Indo-European Community that runs from Portugal to India, and includes other major countries, such as an Iran that never falls to the Shi'a clergy.
This European Community on steroids is as staunchly anti-Communist as the USA during the Cold War, especially since people like Mussolini, Franco and Salazar are in it, and is therefore quite conservative; Indo-European studies progress by leaps and bounds due to the cooperation of half of Eurasia and, with the Christian and Islamic clergy alike being subject to an endless stream of scandals, the surviving pre-Abrahamic religions of the Indo-European world gain quite a few converts (think the West's fascination with Buddhism and New Age), as well as other, revived neo-Pagan faiths.
By the present day, the Indo-European Union encompasses most of Eurasia (the Soviet Union having fallen a few decades ahead of schedule), and it's home to a motley crew of neo-Fascist states tracing their heritage to Evola and Gandhi alike; Christianity and Islam are still dominant in their home turf by far, but conversion to one ethnic religion or the other is not uncommon, especially among peoples, like the Kurds, that want to prove a point (in their case, "fuck Turkey").