I think that the greatest threat to the Church today is the cancer within rather than the Protestants etc without. When so many of the bishops and theologians aren’t faithful to the authentic teachings of the Church how are the laity going to learn their Faith.?
I have been told that in Australia only one third of the bishops are Faithful!
The lecturers in the Catholic teaching colleges are largely not faithful and so they produce teachers who don’t teach the true Faith. We have a very good series of textbooks in Melbourne and Sydney but they aren’t used by the majority of the teachers who consider them “old fashioned” i.e. they present authentic Catholicism.
It’s no wonder that less than 10% of school leavers are practising Catholics by the time they leave a ‘Catholic’ High School. Most are anti Catholic.