It’s the “name calling” not the actual points people are downvoting you for
They're cut from from the Enoch Powell, Goebbels playbook - it's not name calling when it's simple factual description of the source material in question.
This isn't some US Democratic smear at all, Miller is regarded as a far right extremist and outlier by Republicans (eg: https://www.salon.com/2018/01/21/lindsey-graham-slams-stephe...)
Call a spade a spade.
"To be fair" wrt Donald Trump, in my opinion the Generals were bang on describing him as a Fascist but he's nowhere near the level of being an actual Nazi that, say, his father actually was.
He's primarily a self serving opportunist and a supremely talented and natural grifter, the people to really worry about will be his his appointments in this coming term - they'll have their own agenda's and will have relatively free reign to pursue them as long as they are loyal to Trump (in his opinion).
Wasn't Goebbels the propaganda man, and the things Stephen Miller is tweeting about is extremely inflammatory, he is the Trump extreme Propaganda Man.
And since as stated earlier, mass deportations might not be realistic, the propaganda of caged Mexicans and destroying Mexican Families, is the kind of marketing fodder to make the Republican Base 'think' that real action is happening.
Republican's have been making a lot of reasonable claims about a 'legal path to citizenship'. And what does Stephen Miller just do, he tweeted that they will start looking into revoking citizenship for people that was already granted. To reverse citizenship. Where does that end? With Mexicans only? That seems more in line with Goebbels.