The pope and Obama try to compare immigrants (illegal aliens) to Joseph and Mary but they were neither immigrants or illegal aliens.
Luke 2King James Version (KJV)
2 And it came to pass in those days, that there went out a decree from Caesar Augustus that all the world should be taxed.
2 (And this taxing was first made when Cyrenius was governor of Syria.)
3 And all went to be taxed, every one into his own city.
4 And Joseph also went up from Galilee, out of the city of Nazareth, into Judaea, unto the city of David, which is called Bethlehem; (because he was of the house and lineage of David:)
Luke 2King James Version (KJV)
2 And it came to pass in those days, that there went out a decree from Caesar Augustus that all the world should be taxed.
2 (And this taxing was first made when Cyrenius was governor of Syria.)
3 And all went to be taxed, every one into his own city.
4 And Joseph also went up from Galilee, out of the city of Nazareth, into Judaea, unto the city of David, which is called Bethlehem; (because he was of the house and lineage of David:)