I'm surprised the anti-tankie crowd hasn't adopted it to a much greater degree than the occasional reference.

While the Liberals are largely ignorant about history, I think categorizing the Soviet Union and Nazi Germany as the same thing is a bridge too far even for them. This is why they focus on abstract critiques like "authoritarianism" or "totalitarianism." These allow you to discard any alternative to the status quo without having to argue that the people who liberated Auschwitz are exactly the same as the people who built it.

edit before I read purpleworm's reply:

Most of the time when Liberals are shitting on Communism and making grossly ahistorical claims (e.g. calling Putin or Trump a Communist), they are operating in the realm of rhetoric. The history is immaterial to them. They know from decades of programming that Communist is a cheap insult and they'll use it whenever a strained analogy presents itself.

The type of disillusioned Liberal who is actually searching for the point where the United States strayed from the path righteousness, the type of Liberal who would use a symbol like this to differentiate themselves from the standard bearers of American decay, is not operating on this level of slop rhetoric.