It HAS happened here

[Joseph Tracy]

Partial Record of Post WW2 US fascism( militarized, corporatized enslavement, murder and intimidation facilitated by racism, police stae violence etc.):

Continual growth of military budget
Loss of privacy
Vietnam
Congo and much of Africa
Chile
Argentina
Columbia
Cointelpro
Iran
Palestine
Greece
El Salvador
Nicaragua
Honduras
Iraq
HUAC
Murder of Black leaders in US and well documented racism of law enforcement and courts
Purging black voters
Afghanistan
Egypt
Use of Drones
Pervasive pay inequity and sexual abuse of women ongoing in Universities, Military, Media, Entertainment and workplace, 
War on Drugs( while CIA engages in heroin traffic, and US companies sell “opioids")

Millions have been maimed, killed, poisoned, and tortured with the support of both political parties in a game of who is the toughest and smartest
 imperialist, who the most anti- communist  or anti-terrorist.  When they are caught in criminality it is soon forgiven and forgotten. 

The idea that the primary attributes of fascism cannot exist without the anti-semitism and other behaviors of the 3rd Reich is wrong. I have listened for  

50 years of adult life while the bar for US fascism keeps moving farther to the right. If your comfortable lifestyle and sense of identity is dependent on justifying mass killing, you will either go along or quietly be removed from the public eye.

Yes we have a dissident press and freedom of speech, but millions are spent to keep them out of the majority media. This is much cheaper, more effective and less politically dangerous than jails or pogroms.