Hans Kung lost his right to teach theology in a Catholic setting in the 70's.
Here, he's upset that the Pope is trying to get a Catholic group that never accepted Vatican II (and also says the Pope is not Catholic!) back into the fold.
A schismatic pope loses his position according to that same teaching of the constitution of the Church. At least, he cannot expect obedience. Pope Benedict would be therefore encouraging the already widespread popular movement of “disobedience” against a hierarchy that is disobedient to the Gospel. He would bear sole responsibility for the grave rift and the strife created inside the Church. , he would have alone the responsibility. ...
There were a few amusing comments left on the posting.
I've read two of Kung's books; one of them he co-authored entitled "Dying With Dignity." As you might guess from the title he's pro-euthanasia. The other one I read quite awhile ago - "Why I am Still a Christian." The link is to an updated version on amazon.