Stanley Hauerwas is a Protestant and a professor of theology at Duke University. My understanding is that he is among the most highly respected theologians in America today, among both Catholics and Protestants.
Stanley Hauerwas is very familiar with Luigi Giussani’s writings and holds him in high regard. Hauerwas has said that he wishes that he had thought of some of Giussani’s articulations! For a source on Giussani’s reliance on experience, see his book, The Religious Sense, Chapter 1.
Both Hauerwas and Giussani are passionate Christians.