While Hitler and Mussolini both expressed their opposition to and hatred of “Marxists,” they nevertheless embraced a leftism that was only marginally different from that embraced by Lenin and Stalin. In light of recent events and discussions attempting to rehabilitate the historical reputation of Germany’s Nazis, it might be worthwhile to re-examine the foundations of the ideology that underpinned National Socialism and its close cousin fascism. Those who embrace the revisionism that excuses the Nazis’ crimes appear to believe that by doing so, they are defending themselves and their ideological brethren from unfair and ahistorical attacks by the broader left....