I don't know why the Left insists on not talking about it, silencing any who dare even meme about it.

Big Lie Politicking
https://en.wikipedia.org/wiki/Big_lie

The big lie (German: große Lüge) is a gross distortion or misrepresentation of the truth, used especially as a propaganda technique.[1][2] The German expression was coined by Adolf Hitler, when he dictated his 1925 book Mein Kampf, to describe the use of a lie so "colossal" that no one would believe that someone "could have the impudence to distort the truth so infamously."
All this was inspired by the principle – which is quite true within itself – that in the big lie there is always a certain force of credibility; because the broad masses of a nation are always more easily corrupted in the deeper strata of their emotional nature than consciously or voluntarily; and thus in the primitive simplicity of their minds they more readily fall victims to the big lie than the small lie, since they themselves often tell small lies in little matters but would be ashamed to resort to large-scale falsehoods.
It would never come into their heads to fabricate colossal untruths, and they would not believe others could have the impudence to distort the truth so infamously. Even though the facts which prove this to be so may be brought clearly to their minds, they will still doubt and waver and will continue to think there may be some other explanation. For the grossly impudent lie always leaves traces behind it, even after it has been nailed down, a fact which is known to all expert liars in this world and to all who conspire together in the art of lying.
The Cold War historian Zachary Jonathan Jacobson describes its use:[10]
Adolf Hitler first defined the Big Lie as a deviant tool wielded by Viennese Jews to discredit the Germans' deportment in World War I. Yet, in tragically ironic fashion, it was Hitler and his Nazi regime that actually employed the mendacious strategy. In an effort to rewrite history and blame European Jews for Germany's defeat in World War I, Hitler and his propaganda minister accused them of profiting from the war, consorting with foreign powers and "war shirking" (avoiding conscription). Jews, Hitler contended, were the weak underbelly of the Weimer state that exposed the loyal and true German population to catastrophic collapse. To sell this narrative, Joseph Goebbels insisted "all effective propaganda must be limited to a very few points and must harp on these in slogans until the last member of the public understands."
In short, Nazi fascism hinged on creating one streamlined, overarching lie ... the Nazis built an ideology on a fiction, the notion that Germany's defeat in World War I could be avenged (and reversed) by purging the German population of those purportedly responsible: the Jews.