Illegal, Unauthorized, or Undocumented?
While I agree with the call-people-what-they-want-to-be-called principle, I think there's a good substantive case that progressives should favor "undocumented" over "unauthorized." "Unauthorized" takes the harshly judgmental sting out of "illegal." But it still puts the focus on the idea that they're doing something wrong. "Undocumented," however, puts the focus on the condition that makes them vulnerable to various forms of hardship and exploitation. I think progressives who want to be allies of the people in question should want to foreground the latter.
In other immigration-related news, yesterday my wife pointed out an inaccuracy in my post about a study showing that undocumented immigrants had the same crime rate as citizens. The study compared the percent of Maricopa County's population that's estimated to be undocumented to the percent of people booked by the Maricopa County Sheriff's Office who are subject to ICE holds. But it's not just undocumented people who are subject to ICE holds -- people with visas or green cards or other forms of status may also be turned over to ICE if their crime makes them potentially deportable. So undocumented people appear to be arrested disproportionately *less* often than citizens.