“Why would the Devil wish to start a sect that would result in the worship of the true God rather than himself?”
Because that is often how the Devil works. Protestants, for instance, don’t worship the Devil. They most certainly worship the Trinity. Yet are they harming the Body of Christ? Yes. It’s undeniable. The Devil knows he can’t destroy the Church. What he does is chip away at the Church by fostering the creation of sects and enemies. Individual Protestants are likely not really culpable as the Devil is because they do not fully understand what they do is wrong. Ironically, even Muslims claim their own sects are created by Satan: http://www.amazon.com/Devils-Deception-Modern-Salafi-Sect-ebook/dp/B00BH52MO4 And in that regard, Christians are no different:
“Satan has invented heresies and schisms, whereby he might subvert the faith, might corrupt the truth, might divide the unity.” (Cyprian, On the Unity of the Church; excerpted in The Heart of Catholicism: Essential Writings of the Church from St. Paul to John Paul II, Edited by Theodore E. James, Albert J. Nevins, page 142).
Every real traditionalist knows this. How do you not?
Meanwhile, real traditionalists can not (and will not) deny that Vatican II speaks very differently of Muslims and their diabolical religion than pre-Vatican II popes and saints (with the one exception being one obscure letter written by a pope seeking the release of Catholic hostages from Muslims...phew ...good thing the Vatican II drafters found that! Without that, they’d have nothing!).