Laws restricting immigration into the US are difficult to enforce, and they're difficult for Americans to support wholeheartedly. Most of our ancestors came here as immigrants, legally or illegally. In our heart of hearts, we know it isn't fair that it's legal for some people to immigrate here, and not for others.
It's difficult to defend the morality of immigration restrictions, because there's an aspect of racism hidden just below the surface of the history of our immigration laws.
-Joe-