Please do not poison this thread with modernity.
Thank you.
You may be shocked to learn that there is a continuum between the past and the present. It is one piece, and you cannot strip out the parts you don't like.
I see large numbers of parallels between the past and the present. What the Underground railroad was doing was illegal, and just like them, modern people decide what is "moral" based on what they think, and then proceed to break federal law because it is the "moral" thing to do.
Nah bro, the moral thing to do is to change the law through the normal political process rather than to take it upon yourself to be a vigilante.