I've listed Allen Wall's six reasons below, but reading the whole article is highly recommended:

1. AN AMNESTY ENCOURAGES MORE ILLEGAL IMMIGRATION
2. AN AMNESTY IS A SLAP IN THE FACE TO LEGAL IMMIGRANTS WHO PLAY BY THE RULES
3. IN CASE YOU HADN�T NOTICED, THE INS HAS ENOUGH PROBLEMS WITHOUT AN AMNESTY
4. AMNESTY IS A SECURITY BREACH
5. NO AMNESTY SHOULD PRECEDE OUR DEALING WITH MORE BASIC QUESTIONS
6. AMNESTY, AND EMIGRATION IN GENERAL, DOESN�T REALLY HELP MEXICO ANYWAY

For those who don't know, Allen Wall is an American who lives and works in Mexico, and most of his articles are quite good.

While you're still at FrontPage Magazine, you might want to read the article "A Rebuttal of Paul Gigot on Alien Amnesty" by Robert Locke. It was published on September 10, 2001.