Discussing potential post-election violence:
“We have some very bad people. We have some sick people, radical left lunatics. And I think it should be very easily handled by — if necessary, by the National Guard or, if really necessary, by the military, because they can’t let that happen.”
Here is Trump promising to "root out the vermin", that he accuses of cheating in elections (irony is, in fact, dead) and working to destroy the country. The word "vermin", like the phrase "poisoning the blood of our country", is very specific verbiage that calls back to a certain German dictator.
Here is Trump, who even acknowledges that talking about the "blood of the country" was referenced in Mein Kampf, but doubles down anyway.
Dehumanizing and creating a class of "others" is a very well establish move in the authoritarian/fascist playbook. Vermin deserve no rights, no considerations, they are like rodents. A population "poisoning the blood" of a country is an existential threat, which justifies any action, legal or otherwise, to address the threat.