Though it may be true that the Muslims and the papal church served the same god. There is speculation that the papal church nurtured Mohammad into his position as spiritual leader of the Arabs in their hopes to destroy the Syrian Christian churches that were not lining up with papal policies. But then the "project" took on a life of it's own and "backfired".
Somewhere in a box in the garage I still have this book The Keys Of The Kingdom, if I remember the title. You may have read it, written by a Jesuit outlining the plans of the pope for world dominion. He analyses what approaches the pope plans to use on various churches and religions to get them all together. What struck me was that the pope will have much less problems with the Muslims than with Seventh-day Adventists. There seemed to be more similarities between the Roman Catholic Church and the Muslims than with SDA. Therefore it would be easier for the pope to come to an agreement with the Muslims.
It also struck me that the greatest problems of the pope with SDA did not seem to be neither the Sabbath nor that SDA regard him as Antichrist, but the fact that SDA give each person the freedom of choice if they want to be saved or not. This points to the Catholic doctrine that politicians and the military/police will eventually force the whole earth into one camp where no one escapes salvation. That, according to Catholic doctrine, is the Second Coming of Christ, not in the flesh, but in his church on earth.
I believe you are refering to "The Keys of This Blood" by Malachi Martin.
Indeed he wrote of the papal view of islam in the Globalist battle:
"In reckoning the future of Islam, Pope John Paul takes into account that as a genuinely religious faith, it preserves certain fundamental truths that the Holy Spirit reveals to all people of good will; and that, in God's providence, Islam can be a threshold from which its adherents can be prepared to accept the only historical revelation made by God in this world. There will come a day, John Paul believes, when the heart of Islam--already attuned to the figures of Christ and of Christ's Mother, Mary -- will receive the illumination it needs." Page 285Of Seventh-day Adventists he writes:
"Among the Christian Minimalists, the opposition is virulent and has a long history. Despite the mutual differences, for instance, between the Advent Christian Church, the Church of God of Abrahamic Faith, and the Seventh-Day Adventists, thery are at one in the opposition to Rome as the "Red Whore of the Mediterranean" Given their separate and separatist perspectives on the world, in one sense they are uneasy allies at best....their origins unite them in a particular point of view concerning Pope John Paul. They all arose within the context of rebellion against the authority and privileged teaching power of the Roman Church. pag 286I have another book:
"Queen of Rome and Queen of Islam, Queen of All"by Jim Tetlow, Roger Oakland, Brad Myers
and they show
how the Muslims are already in tune with Christ and "Christ's Mother".
In the Koran (and those who have read it from cover to cover can verify) Jesus is almost exclusively referred to as "Jesus son of Mary". Never as "Son of God".
Yet the Koran holds both Jesus and Mary in high esteem. Jesus as a "prophet" and Mary" the greatest of all women."
The book documents how muslims have been flocking to see Apparitions claiming to be "Mary".
It's thesis is that spiritualism (through signs and wonders connected with the Apparition claiming to be Mary) will unite the religions. The "mother/child" goddess seems to transend all religions, thus striking a note of unity that can be merged with "signs and wonders" to bring the world into unity .
The late Archbishop Fulton Sheen is quoted as saying:
"It is our firm belief that the fears some entertain concerning the Moslems are not to be realized, but that Islam instead, will eventually be converted to Christianity -- and in a way that even some of our missionaries never suspect. it is our belief that this will happen not through the direct teaching of Christianity but through a summoning of the moslems to a veneration of the mother of God. [The World's First Love--Mary, Mother of God, p. 204 as quoted on page 35 in "Queen of Rome and Queen of islam, Queen of All"]