The mask is off and the fascist is visible for all to see. Donald Trump on twitter:
"Democrats are the problem. They don’t care about crime and want illegal immigrants, no matter how bad they may be, to pour into and infest our Country, like MS-13. They can’t win on their terrible policies, so they view them as potential voters!" he continued in another tweet.
The Hill: "Trump: Dems want illegal immigrants to 'infest our country''"
Yes, Nazi propaganda. Dehumanization. If immigrant children are vermin that infest, separating them is kind because they should be exterminated. That is Trumpian logic.
Mikel Jollet explains it well:
Our President embraces Nazi dehumanization.
He must be stopped.
Illegal orders must be disobeyed.
Are we Nazis or are we Americans?
Update I:
Nazi propaganda was rife with imagery that compared Jewish people (not to mention various other “undesirables,” such as Romani people, homosexuals, and those with disabilities) to various animals: rats and “vermin” spreading infection, parasitic insects feeding on “host” nations, and worms which caused rot. In Mein Kampf, Hitler described Jewish people as blood-sucking “spiders,” “vermin,” and “a parasite in the body of other peoples.”
snopes