By the time you get to green card holders, ICE prosecutors have to articulate a ground of removability (listed in U.S. law), tell an immigration judge the person has violated it, and get the judge to agree.

That is still a much lower level of protection than citizens — of any sort — have. +

Unlike, say, someone who’s paroled into the U.S., ICE can’t just strip someone with a green card of legal protections _by_ arresting them. Nor is it like a non-immigrant visa, where, say, State can unilaterally revoke, but for a specific reason (eg you were working not student-ing). +