We've already got a thread about Marjorie Taylor Greene, but I thought I would add some additional comments to the Nazi threat.
Here's what Daily Kos had to say:
" Historians have made clear that QAnon is just another iteration of the “nocturnal ritual fantasy” in which some group is accused of “perverse, ritualistic behaviors that target innocents.” Once people are placed in the category that supports or benefits from such behavior, then any action against them is licensed. After all, why not call for the murder of Democratic politicians … if they’re baby-eating Satanists under the control of a secret Jewish cabal?
As Just Security put it:
A secret cabal is taking over the world. They kidnap children, slaughter, and eat them to gain power from their blood. They control high positions in government, banks, international finance, the news media, and the church. They want to disarm the police. They promote homosexuality and pedophilia. They plan to mongrelize the white race so it will lose its essential power.
If that sounds familiar, it’s because it’s lifted straight from the most influential anti-Semitic work of all time, The Protocols of the Elders of Zion. Published in 1902, it was a core document for building the Nazi movement in the decades before World War II.
https://www.dailykos.com/stories/2021/1/29/2012709/-QAnon-is-just-another-word-for-Nazi-and-Rep-Marjorie-Taylor-Greene-is-making-that-very-very-clear
Here is more information about the Protocols of the Elders of Zion:
The Protocols of the Elders of Zion or The Protocols of the Meetings of the Learned Elders of Zion is a fabricated antisemitic text purporting to describe a Jewish plan for global domination. The hoax, which was shown to be plagiarized from several earlier sources, some not antisemitic in nature,[1] was first published in Russia in 1903, translated into multiple languages, and disseminated internationally in the early part of the 20th century.
Henry Ford funded printing of 500,000 copies that were distributed throughout the United States in the 1920s.[2] Distillations of it were assigned by some German teachers, as if factual, to be read by German schoolchildren after the Nazis came to power in 1933,[3] despite having been exposed as fraudulent by the British newspaper The Times in 1921 and the German Frankfurter Zeitung in 1924. It remains widely available in numerous languages, in print and on the Internet, and continues to be presented by neofascist, fundamentalist and antisemitic groups as a genuine document. The political scientist Stephen Bronner described it as "probably the most influential work of antisemitism ever written ... what the Communist Manifesto is for Marxism, the fictitious Protocols is for antisemitism".[4]
- “The wall beside his desk in Hitler’s private office is decorated with a large picture of Henry Ford,” The Times reported. The publication added that Hitler kept a translated copy of The International Jew in his office as well. In March 1923, a reporter for The Chicago Tribune interviewed Hitler.
https://en.wikipedia.org/wiki/The_Protocols_of_the_Elders_of_Zion
Here's more on QAnon itself:
At its heart, QAnon is a wide-ranging, completely unfounded theory that says that President Trump is waging a secret war against elite Satan-worshipping paedophiles in government, business and the media.
QAnon believers have speculated that this fight will lead to a day of reckoning where prominent people such as former presidential candidate Hillary Clinton will be arrested and executed.
In October 2017, an anonymous user put a series of posts on the message board 4chan. The user signed off as "Q" and claimed to have a level of US security approval known as "Q clearance".
These messages became known as "Q drops" or "breadcrumbs", often written in cryptic language peppered with slogans, pledges and pro-Trump themes.
The amount of traffic to mainstream social networking sites like Facebook, Twitter, Reddit and YouTube has exploded since 2017, and indications are the numbers have gone up further during the coronavirus pandemic.
The big social media companies subsequently tightened their rules about QAnon content and took down hundreds of Q-supporting accounts and videos.
But social media and opinion polls indicate there are at least hundreds of thousands, if not millions, of people who believe in at least some of the bizarre theories offered up by QAnon.
QAnon supporters drive hashtags and co-ordinate abuse of perceived enemies - the politicians, celebrities and journalists who they believe are covering up for paedophiles.
It's not just threatening messages online. Twitter says it took action against QAnon because of the potential for "offline harm".
Several QAnon believers have been arrested after making threats or taking offline action.
https://www.bbc.com/news/53498434
In August of 2019, the FBI declared QAnon a domestic terrorism threat.
https://www.yahoo.com/entertainment/fbi-declared-qanon-domestic-terrorism-181448533.html