Being deported without due process is a huge problem! But the place to address that is the courts. Indeed, progress is being made on that front.
I also know that the courts are turning into wholly-owned subsidiaries of the Trump Organization. Not all of them, of course. But as for the rest, if there is no way for them to enforce their rulings -- and it seems there is not -- then they have no more power than random commenters on Hacker News, and deserve no more consideration.
Progress is being made in both directions on this front. If you truly believe in the law, then argue for it. Considering the fact that the current POTUS is a convicted felon, and the supreme court has practically eliminated all checks on his power, I'll be taking arguments for lawlessness seriously.
Due process is ultimately what keeps this from happening to YOU.