The Catechism then asks “How does the Catholic sin against Faith? “
Answer: “A Catholic sins against Faith by apostasy, heresy, indifferentism and by taking part in non-Catholic worship.”
By taking part in non-Catholic worship!
This, indeed, is a powerful indictment against the present ecumenical practice that has swept through and disfigured the Church since the Council.
Thanks to ecumenism, we witnessed the unprecedented scandal of Catholic prelates, Priests and laity praying in public with members of false religions, and even conducting this interdenominational worship [which is no worship at all] inside Protestant churches. We see our highest leaders in the Church dialoguing with heresy, rather than combating it openly and courageously.
From the book: The Revelations of the Holy Face of Jesus by John Vennari