Is it primarily an attack on human rights or an attack on religion?
Maybe religions shouldn't be allowed to indoctrinate trapped people (who have little else to read). Maybe this was an act of kindness to protect the prisoners?
Maybe the prison chaplain should be required to represent all religions equally.
Maybe prisons should be required to provide a balanced proportion of reading materials.
Or maybe the prisons should be required to provide the prisoners with nothing else except "Programming for Dummies" and "General Physics" books, so they can contribute to the engineering job force when they get out (we could use more engineers).