Yes they try to absolve Paterno and in some ways I can understand that. Worship happens. And Paterno did tell his bosses...should he have done more? Yes. But he didn't do nothing.
Paterno was part of a generation...much like my grandparents who couldn't fathom that Sandusky could do what he did especially having a personal relationship with him. It doesn't jive with who they know so they can't fathom that the person in question could do it.
My blame is on Sandusky way more than the school or Paterno...but some don't seem to approach it that way.