Neil Addison in a comment on the blog LMS Chairman 1 writes 'I have a book called "Inside Islam, A Guide for Catholics" published by Ascension Press and written by Daniel Ali and Robert Spencer.
Not perfect but one of the few books to approach the subject from a Catholic rather than an Evangelical Protestant perspective. It is available on Amazon and other outlets'.
Joseph Shaw in that post says 'we need a critique of Islam of our own' he means we cannot use the apologetics of the evangelicals.
I have not read the book by Daniel Ali and Robert Spencer.However the odds are that they interpret Vatican Council II like the Bishop of Mostar and the traditionalists.2 They use apparition theology. It is the progressivist interpretation of the Council approved by the Magisterium and the Left and it is based on an irrationality.
It is the irrationality which forms a new theology which is used to interpret Vatican Council II as a break with Tradition and the dogma extra ecclesiam nulla salus.So with an ecclesiology different from pre-1949 times the understanding of Islam and the other religions will have also changed. The old apologetics will not have meaning any more.Progressivists would simply say 'Vatican Council II has changed all that' when they are really referring to a theology based on an irrational premise and inference.
If Robert Spencer does not use the irrational premise and inference which comes from the Letter of the Holy Office 1949 then there can be no exceptions mentioned in Vatican Council II to the rigorist, Feeneyite interpretation of the dogma on exclusive salvation in the Church.
With the irrationality it is inferred in the Letter of the Holy Office that there is salvation outside the Church; there is known salvation outside the Church. The Letter issued by Cardinal Marchetti Selvaggiani infers further that these known cases are defacto exceptions in the present times, to all needing to be formal members of the Church for salvation.
This is the Cushing-Marchetti interpretation of the dogma, the progressivist one.So it means all Muslims in the present times do not need to convert into the Church to avoid Hell and go to Heaven.
This is the interpretation understood by Robert Spencer otherwise I am sure he would have quoted Vatican Council II which is in accord with the rigorist intepretation of the dogma, as it was understood over the centuries.
Robert Spencer needs to review the dead man walking and visible theory, apparition theology, which is common among US bishops including the bishop of Worcester, Bishop Robert McManus who refused to have Spencer talk in his diocese.He needs to write another book on Catholic apologetics with reference to Islam. This would be a book in which Vatican Council II is affirmed and yet ecclesiology would not be different.-Lionel Andrades
Cardinal Francesco Marchetti Selvaggiani and Cardinal Richard Cushing changed all that.They were playing God just like Martin Luther or King Henry VIII.
The faith at Mostar is not based on the Bible, Tradition and the pre-1949 Magisterium