The Libertarian Party has a great article on immigration - you can find it here. One interesting aspect of the discussion is the one that centers on the idea that our laws in America have sometimes changed - the example given is how Prohibition was law until it was repealed. Here is a clip from the piece:
"When large numbers of otherwise decent people routinely violate a law, the law itself is probably the problem. To argue that illegal immigration is bad merely because it is illegal avoids the threshold question of whether we should prohibit this kind of immigration in the first place.I say all of this to simply caution us from relying on civil law when we interpret events in our world. Many who argue for enforcing immigration law might advocate for overturning abortion laws in the US based on what they might consider a higher moral law. Some feel the same way about immigrants that break US law when they cross our borders.
We've faced this choice on immigration before. In the early 1950s, federal agents were making a million arrests a year along the Mexican border. In response, Congress ramped up enforcement, but it also dramatically increased the number of visas available through the Bracero guest worker program. As a result, apprehensions at the border dropped 95 percent. By changing the law, we transformed an illegal inflow of workers into a legal flow."
So, in the end, I think my allegiance is first and foremost to the moral law of love. The Ten Commandments are rooted in this law and the Golden Rule speaks it concisely. Every other law can change but this one law will always be true.