It's not an assumption. Overt Nazism was destroyed by the West allied to the Soviet Union.

Overt Nazism was destroyed by Soviet Union Red Army. Alfred Jodl attempted to surrender to the Supreme Headquarters Allied Expeditionary Force (SHAEF) in Reims, France, but since it was not accepted by the Red Army, they insisted German High Command must ratify the capitulation. The surrender ceremony was repeated in Berlin on 8/9 May.

West was basically murdering German civilians testing, for example, new thermobaric bombs on innocent people of Dresden. But Nazi army capitulated to the Red Army only.

West didn’t destroy ‘Overt Nazism’, because they have saved every overt Nazi they could find. See the example of Yaroslav Hunka

They destroyed Germany so they could control it, and after the war install NATO under the slogan: “To keep US Army in, Germans down and Russians out”. That is no secret in history.