Moreover, it's important to note that the idea that false sects can be a "means of salvation" was taught be John Paul The Great Apostate in "Catechesi Tradendi" of 10/16/79 using the near word for word verbiage of Vatican 2:
"It is extremely important to give a correct and fair presentation of the other Churches and ecclesial communities, that the Spirit of Christ does not refrain from using as means of salvation."
Non-Catholic religions are not a "means of salvation", since the Roman Catholic Church is the unique way of truth and salvation.