Bush doesn't give a rat's heiny about fox
He is doing it to assure more Republicans get more Hispanic votes.
It also makes some big business users of that cheap labor very happy (campaign contributions).
You should hush up with the criticisms. This is an issue where the faithful should hide their personal beliefs and go along. (like with all the anti-free-trade, anti-fiscal-conservative, anti-entitlement-deconstructionist, pro-big government, etc. things that Bush has done for political reasons)