Fundamentalists, faithful to the clear one-way teaching of Christ, often conclude from this that pagans, Buddhists, et cetera, cannot be saved. Liberals, who emphasize God's mercy, cannot bring themselves to believe that the mass of men are doomed to hell, and they ignore, deny, nuance, or water down Christ's own claims to uniqueness. The Church has found a third way, implied in the New Testament texts. On the one hand, no one can be saved except through Christ. We are not saved by knowledge but by faith.
Scripture nowhere says how explicit the intellectual content of faith has to be.
But it does clearly say who the one Savior is. The Second Vatican Council took a position on comparative religions that distinguished Catholicism from both Modernist relativism and Fundamentalist exclusivism. It taught that on the one hand there is much deep wisdom and value in other religions and that the Christian should respect them and learn from them. But, on the other hand, the claims of Christ and his Church can never be lessened, compromised, or relativized. We may add to our religious education by studying other religions but never subtract from it.