To counter Rousset and his like—and keep “progressive” intellectuals in line—Communist parties exercised the moral lever of “anti-Fascism.” This had the appeal of familiarity. For many Europeans their first experience of political mobilization was in the anti-Fascist, Popular-Front leagues of the 1930s. For most people the Second World War was remembered as a victory over Fascism, and celebrated as such in France and Belgium especially in the post-war years. “Anti-Fascism” was a reassuring, ecumenical link to a simpler time.
—Tony Judt, Postwar, A History of Europe Since 1945
*Per MQ in the comments, I see this might be better titled: "Read: 'Islamo-fascism' "