It's intellectual pride tainted by German existentialist philosophy. Benedict is such a pseudo-intellectual. He tries to use Heidegger-type language and mix it in with his unique brand of non-Catholicism, and it is so amateur. He isn't even good at it.
Now, someone like Hans Urs von Balthasar, he is sort of what Benedict wants to be, the ultimate German super-brain mystic-philosopher-intellectual Catholic or "Catholic." He has this enormous capacity to synthesize information, much of which seems beyond the confines of Catholicism or irrelevant to it. And of course he has his own wacked theories.
Wikipedia said --
Balthasar has expressed some sympathy with a "hope" for salvation for non-Christians, but warns against asserting it. Universal salvation, if it happens, would be the result of Christ's "utter abandoment".
Uh, there is no hope for it, that alone is a heresy, though he tries to make it sound less bad than saying it WILL happen.
Germans have a strong mystic streak ( yes, I know Balthasar is Swiss, but he's German-speaking as are many modernist mystics ) and this is what happens when it goes rotten and the devil gets in there, making them take their whims and fantasies and musings for reality i.e. when there is no discernment of spirits.