The cognitive bias is the effect of the big lie. Anti-semitism was already prevalent throughout Western culture at that time, and so the lie was easier to believe because of pre-existing cultural prejudice, and later because the propaganda was simply inescapable.
I'm truly not trying to be dense, but the "Big Lie" (according to Hitler) is something allegedly perpetrated by the Jews against Germany's military, by "blaming" it for the downfall of the nation. "The lie" to what you seem to be referring to doesn't seem to be the the "Big Lie" itself but simply antisemitism ("the Jews are to blame"). These are separate things. It requires antisemitism to believe the Big Lie exists and is perpetrated by "the Jews".
From Wikipedia:
> "Hitler believed the technique [i.e. the Big Lie] was used by Jews to blame Germany's loss in World War I on German general Erich Ludendorff, who was a prominent nationalist and antisemitic political leader in the Weimar Republic."
Maybe we're in violent agreement and I simply misunderstood what you're saying :)
edit: to clarify what I'm saying, there are two uses of "Big Lie" at play:
1- The narrative of "The Big Lie", the alleged lie "denounced" by Hitler. This was of course not a real thing, and Hitler made it up while looking for scapegoats and using antisemitism to blame the Jews.
2- The creation of the "Big Lie" itself by Hitler. This is a real thing, but we have a simple word for it: an antisemitic lie.
I don't think this confusion is unintentional. It's a classic fascist tactic to muddy the definition of words, phrases and symbols used by their opponents in order to force the conversation into emotional arguments. You can't have a rational argument when nobody agrees on the definition of the thing you're arguing about.
Judging from your other comments here, we may simply be using the same term in different ways - yours being the historically correct one, mine the colloquial one.
