I assume that you are asking about John Tierney's op-ed piece that appeared in the New York Times in 2006. I have linked to that piece below.
In that column, Tierney argued that Hispanic immigrants should be welcomed and treated better than they are now. His basic premise is that the Hispanic immigrants that come to America today (even if they are here illegally) are no different than the Irish immigrants (and others) who came to the United States in times past. Tierney contrasts the life of Angel Espinoza, a Mexican illegal immigrant, with that of Tierney's own grandfather, an Irish immigrant.
Tierney argues that Hispanic immigrants are simply trying to achieve the American dream for themselves and their descendants, just as the Irish did. He thinks that there is no reason to give them any less of a shot at citizenship than the Irish had. Therefore, what should be done about immigration is that it should be welcomed. Congress should let the illegal immigrants get on a path to citizenship so they can help build the country like Tierney's grandfather did.