The incarnation accomplished what can only a cosmic Mack Truck could do:
“The Word became flesh.” By his Incarnation Jesus restored in himself God’s creation of man and woman at the beginning of human history in his own image. Jesus is the perfect image of the Father and thus becomes the source of restoring all of humanity as the image of God. Jesus renews the original dignity of the human being, indeed now raising it to a still higher status. Recall what the priest prays during the Preparation of the Gifts at Mass when he pours a little water into the chalice of wine: “By the mystery of this water and wine may we come to share in the divinity of Christ who humbled himself to share in our humanity.” Humanity is called now to deeper share in the life of God and this intensifies the regard that men and women have for one another. Because of the Incarnation all human beings are connected to Christ and destined to find eternal fulfillment in him. In his Encyclical Letter Redemptoris Missio St. John Paul II wrote: “Jesus came to bring integral salvation, one which embraces the whole person and all mankind, and opens up the wondrous prospect of divine filiation.”
The Church’s defense and protection of all human beings and human rights flows not simply from a philosophical principle, or from the natural law, but even more profoundly from its belief in the connection of all human beings to Christ and their destiny in him because of the Incarnation. This connectedness and destiny of all humanity to and in Christ is also the foundation of the Church’s solidarity with all peoples. Respect for the dignity and rights of others entails more than just the observance of the Ten Commandments. In the Sermon on the Mount Jesus commands the cultivation of virtues which ennoble not only one’s own self but, even more, enhance the well-being of others. Thus, for example, we are commanded not only not to kill another, but also not to be angry at someone or call a person a “fool” (cf. Mt. 5:21-22).
You’d never know that Jesus condemned the Pharisees, wasn’t particularly concerned to see Judas restored, or prophesied doom on Jerusalem. That’s okay. We can find a text in the Bible to support whatever virtue we like.
By the way, those Reformed Protestants inclined to the cosmic significance of the gospel should pay attention and make better arguments.