The very essence of the Christian gospel rests, not upon opposing abortion, dictating who can marry whom, rejecting science or reason, or securing property rights for the affluent. The heart of the gospel rests upon the ethical injunction to care for the least of these: "For I was hungry and you gave me nothing to eat, I was thirsty and you gave me nothing to drink, I was a stranger and you did not invite me in, I needed clothes and you did not clothe me, I was sick and in prison and you did not look after me... Truly I tell you, whatever you did not do for one of the least of these, you did not do for me' Matthew 25: 42-45.
When we close our hearts and our borders to those who are fleeing oppression and death, warfare and certain destruction, who are simply trying to find some semblance of stability in which to care for themselves and their children... there is no other way to say it - we are refusing that injunction, the defining core of Jesus's teaching. And to profess the name of Christ with the lips, while rejecting this injunction with one's actions (or with a nation's actions), is hypocrisy.
I don't care what stripe of Christianity one espouses, Pope Francis is indisputably correct.