How quickly we slip in barbarity.  From Normalizing Atrocity, Ken Orphan writes on Counterpunch:

“Thousands of socialists and leftists were marched into stadiums in Chile in the 1970s and gunned down, tortured, or disappeared in a country with a much smaller military than the US. Between 1965 and 1966, at least a million communists, or those believed to be communists, were hunted down and brutally murdered in Indonesia by rightwing death squads and the police. And millions of Jews, Roma, communists, homosexuals and the disabled were persecuted, rounded up and sent to concentration camps in the 1930s and 40s in Germany and Nazi occupied countries, where most perished at a time when many ordinary people thought “the logistics” of doing something like that were too “enormous” to fathomed, much less carried out. And each atrocity was preceded by the rise of a pernicious fascism and the language of dehumanization by leaders.

The notion that atrocity “can’t happen here” is soundly refuted by the fact that it has happened here. And countless times. The US, a nation founded upon organized ethnic cleansing and genocide of the native population, and the brutal enslavement of millions of Africans, has also been home to more recent mass atrocities. Thousands of black and brown men and some women were lynched over the early part of the 20th century. Events organized and sanctioned by authorities, police and politicians, where popcorn, postcards and body parts were sold as souvenirs to the ghoulish onlookers. Thousands of Japanese Americans were rounded up and put in internment camps in the desert during WW2 for the sake of “national security.”

The US has many a precedent to follow with regards to mass detainment and slaughter.

And even a short historical account of the American ruling establishment and its institutions reveals that it has the capacity to participate and administer the most heinous crimes against humanity that have ever been conceived. ICE is more than happy to follow his dictates, and establishment Democrats, the so-called “resistance,” have indicated time and time again that they will unite with Republicans in defending the most odious of American policies.

One thing history has proven is that mass atrocity can be committed with few people, with great efficiency at a moment’s notice, little technology, and with shocking approval or the complacence of the majority of ordinary people. But it must first be normalized. To be sure, if a people can tolerate dehumanizing language of entire groups by its leader, and the utterly sadistic policy of ripping children from the arms of their parents and putting them in cages, or pregnant women being shackled to beds, or the torture of non-violent LGBTQ and mentally ill migrants via solitary confinement for days, or militias working in tandem with government agencies to round up unarmed migrants, or a government prosecuting those who provide water and shelter to other human beings in desperate need, it is certainly capable of tolerating, or even applauding, even worse monstrous depravity. And without a doubt, we are only one absurd tweet away from that potential nightmare.

Election time in 2020. War abroad and societal repression on the homefront perfect for reelecting an populist incumbent president.