Today's leftists, socialists and progressives would bristle at the suggestion that their agenda differs little from Nazism. However, there's little or no distinction between Nazism and socialism. Even the word Nazi is short for National Socialist German Workers Party. The origins of the unspeakable horrors of Nazism, Stalinism and Maoism did not begin in the '20s, '30s and '40s. Those horrors were simply the end result of long evolution of ideas leading to consolidation of power in central government in the quest for "social justice." It was decent but misguided earlier generations of Germans, like many of today's Americans, who would have cringed at the thought of genocide, who built the Trojan horse for Hitler to take over.There's an old brainteaser - what if you had a time machine and could back in time to kill Hitler as a boy. Would you do it? Well thanks to Williams, no need for a time machine. We liberals are working to build a Nazi/Stalinist/Maoist state right now. And it's up to you conservatives to stop us. Presumably by peaceful means, if possible.
I should point out that this is very simplistic bad history as well; but I've done that a few times in the past. Suffice it to say that declaring all of the monsters of history Liberal is very satisfying (somewhat like declaring the Bible conservative) but does not make historical sense.