"You shall not molest or oppress an alien." Exodus 22:20
The readings cause us to reflect upon immigration which, although not as essential an issue as abortion or religious liberty, is still something to consider in our times.
There are two principles Catholics must hold: 1. People have a right to migrate in order to support themselves and their family. 2. Governments have a right and duty to secure their borders and require immigrants to fulfill certain duties to the State.
Far too many Catholic leaders (and most Catholic Bishops) only speak of the right to migrate and the compassion that ought to be show to immigrants, but almost completely ignore the duty of nations to secure the boarders and regulate immigration.