The agents you mentioned are certainly as culpable as the illegal invaders. But these people have made a conscious choice to flaunt our laws and violate our borders. And their home government, by encouraging and assisting them to do so, and profiting by their actions, has committed an act of War against the United States.
Sorry any Church is not in the law enforcement business. Churches have been in the sanctuary business. Bush is in the law enforcement business. If employers can find the illegals, then Bush should have no trouble finding them.