See here for D. M. Lloyd-Jones on Roman Catholicism. Here is a flavour of his address:
[Rome] is indeed a form of the antichrist, and it is to be rejected, it is to be denounced; but above all it is to be countered. And there is only one thing that can counter it, as I said at the beginning, and that is a biblical, doctrinal Christianity. A Christianity that just preaches "Come to Christ" or "Come to Jesus" cannot stand before Rome for a second. Probably what that will do ultimately will be to add to the numbers belonging to Rome.
We must warn them. There is only one teaching, one power, that can stand against this horrible counterfeit; it is what is called here "the whole armor of God".
It is a biblical, doctrinal, theological presentation of the New Testament truth. That was how it was done in the sixteenth century. Luther was not just a superficial evangelist, he was a mighty theologian; so was Calvin; so were all of them. It was that great system of truth, worked out in its details and presented to the people, that undermined and even shook the Church of Rome. Nothing less than that is adequate to meet the present situation. Christian people, your responsibility is terrible. You must know the truth, you must understand it, you must be able to counter false teaching.
Christian people, your responsibility is terrible. You must know the truth, you must understand it, you must be able to counter false teaching.