Unfortunately, too many Christians have been deceived to think that our duty to love and care for illegal aliens means that we should ignore immigration laws and disregard our borders. But as President Ronald Reagan once said, "A nation without borders is not a nation." Our borders are compromised by illegal immigration, infiltration of terrorists, and by government policies of regional partnership that actually dilute the sovereignty of the United States. The choice is not between our Christian duty and our border laws – it's a matter of life or death for our nation.
These are the best arguments that I've seen so far for those that use the 'emotion' card when debating the issue.
The same God who commands that we treat aliens and "strangers" with righteousness and justice also clearly defined the physical borders for the nation of Israel, in detailed geographical terms, in Numbers 34. Israel, then and today, would not exist without borders—and neither will America.