-they frequent my church, and I do not understand them.
They may frequent the church, but the clearly have absolutely no understanding of the churches teachings. Showing up for mass every week does not remotely mean you have been exposed to or understand the doctrine of the Church, or more frighteningly the word of God.
The Catholic Church takes untold heat for its stands on abortion and birth control, but when you actually bother to find out how those stands are drawn from the basic fundamental truths of the world and God, there is truly no other conclusion one can make.
The rhetorical attacks the Church endures by those that hate her, are by and large based on complete ignorance.