Kindness to strangers is one of the highest forms of morality. To love others when it is to your benefit, because you’re expecting something in return, is no shining deed. That is enlightened self interest. To love others when there is nothing in it for you, when it is perhaps even hazardous to your health, that is true selfless love. Fear of the stranger, while a natural impulse for self-preservation, keeps us from risking true love of neighbor.
“For if you love those who love you, what reward do you have? Do not even the tax-collectors do the same? And if you greet only your brothers and sisters, what more are you doing than others? Do not even the Gentiles do the same?”