What false doctrine does it teach concerning ecumenism?
The teaching of Vatican II concerning ecumenism, which states that non-Catholic religions are a “means of salvation,” is overtly heretical. This doctrine directly contradicts the teaching of the Church that there is no salvation outside the Catholic Church, called by Pope Pius IX “a most well-know Catholic dogma.” In addition, the ecumenical practices which have resulted from this heretical doctrine are directly contrary to Mortalium Animos of Pope Pius XI.
