I also found via a search on the Vatican website a statement issued by John Paul II for migration day of 1996. He is very clear, nations have the right to secure their borders and to stop illegal immigration into their countries.
He goes so far as saying when an illegal can not become a citizen because of laws or other considerations it is the Churchs job to "ask them to leave". Completely different from what Mahoney is doing/saying.
http://www.vatican.va/holy_father/john_paul_ii/messages/migration/documents/hf_jp-ii_mes_25071995_undocumented_migrants_en.html
Highlights
"Illegal immigration should be prevented, but it is also essential to combat vigorously the criminal activities which exploit illegal immigrants. The most appropriate choice, which will yield consistent and long-lasting results is that of international co-operation which aims to foster political stability and to eliminate underdevelopment"
"4. When no solution is foreseen, these same institutions should direct those they are helping, perhaps also providing them with material assistance, either to seek acceptance in other countries, or to return to their own country"
Thank you for finding that! Another poster claimed different, but I couldn't remember what the Holy Father actually said. Look, if someone crawls onto your property and is in bad shape, give that person aid, and call the appropriate agency, ie:an ambulance and the sheriff. They can sort out legal status. You've done your job as a judeo-Christian/human being.
The more time that passes, the more I think that Mahoney has more loyalty to communism than to the Church.