Did German film director Werner Herzog say, "Dear America: You are waking up, as Germany once did, to the awareness that 1/3 of your people would kill another 1/3, while 1/3 watches"? No, that's not true: The quote originated on a parody Twitter account called @WernerTwertzog, which emulates the existentialist aphorisms and dark humor for which Herzog is known. Werner Herzog has publicly stated that he is not an active user of social media, but does not mind people imitating him on Facebook and Twitter.
Dear America: You are waking up, as Germany once did, to the awareness that 1/3 of your people would kill another 1/3, while 1/3 watches.
This is what the post looked like on Facebook at the time of writing:
(Source: Facebook screenshot taken on Fri Aug 27 15:57:19 2021 UTC)
The quote originally appeared on the Twitter account @WernerTwertzog on August 23, 2017, (archived here). According to the account's bio, @WernerTwerzog is "Werner Herzog's unpaid internet stooge," referring to something Werner Herzog said during an appearance on "Conan O'Brien" in 2017.
I'm not on Facebook or Twitter, however, on the internet you find me: Facebook, Twitter, but it's all impostors. I do have a lot of doppelgangers out there, and it's fine. Fine for me, they are my unpaid bodyguards. They're unpaid stooges.
The account's bio also states that the @WernerTwertzog account was featured in the anthology "The Best American Nonrequired Reading," which reveals the person behind the parody account to be William Pannapacker, an English professor at Hope College.