My main criticizm of the Trump administration's handling of the situation, as an outside observer, is that they are persistently and maliciously bypassing due process (muslim ban imposed arbitrarily even on legal residents while people were in the air, separating children from their parents, etc). Frustration and revulsion at these actions naturally throws a sharp spotlight on whatever else the administration does with regard to immigration, and rightly so. As I said, you're probably right on those incidents, but it's also fair to say that the degree to which a tactic is used also matters, and they deserve every single bit of enhanced scrutiny they face on this issue.
I've heard claims that there are terrorists among the thousands of men, women and children seeking asylum (or work).
Fake news is not just made up stories. It is also misrepresenting the words of other people to support your political motives.
https://www.democracynow.org/2004/3/17/haitis_history_noam_c...
Or see the 70s and 80s and South America, or our reasoning for invading Iraq in the 2000s, or the 1960s and Vietnam. Or the 1953 coup d'etat against Iran because BP was going to lose their investments. And, and, and....
The answer isn't trying to create another hegemon of "real" news, like it was in the good old days of monoculture. The answer really is in what the person above said, people have to be more discerning. Also, the problem really isn't "new" because it really wasn't 'better' in the past -- just invisible to most of the people who are wringing their hands about this in 2018.