The list author says: "Under John XXIII, the legendary "Spirit of Vatican II" was thought to be the beginning of a new era, in which change would be welcomed in the Catholic Church---including theological change.
However, after the 1968 birth control encyclical "Humanae Vitae," some MASSIVE changes in society as a whole, and the ascendancy of the dynamic John Paul II to the Papacy (with Cardinal Joseph Ratzinger as the theological "enforcer"), things changed. There is a Catechism of the Catholic Church, Cardinal Ratzinger has become Benedict XVI, and theological dissenters from the traditional teaching have been disciplined, excommunicated, and otherwise made to feel unwelcome.
(Of course, when one participates in a hierarchical organization such as the Catholic Church, one must grant the hierarchy the power---whether or not one concedes the justification---to exercise its authority; this applies to Archbishop Marcel Lefebvre, as well as to Hans Kung.)
Here are some of the theologians who have suffered censure from the Catholic Church, and some books about their battles with the Church; read for yourself, and decide."
"In this book, Father Collins details his own struggles with the Church over his book "Papal Power," and the struggles of six other theologians. In 2001, Collins resigned from active priestly ministry."