Have you told them the true Gospel and why the Catholic gospel is a false one? Remeber, false gospels ARE our enemies.

2 Corinthians 10:3-5

3 For though we walk in the flesh, we do not war according to the flesh,
4 for the weapons of our warfare are not of the flesh, but divinely powerful for the destruction of fortresses.
5 We are destroying speculations and every lofty thing raised up against the knowledge of God, and we are taking every thought captive to the obedience of Christ


Galatians 1:8-10

8 But even if we, or an angel from heaven, should preach to you a gospel contrary to what we have preached to you, he is to be accursed!
9 As we have said before, so I say again now, if any man is preaching to you a gospel contrary to what you received, he is to be accursed!
10 For am I now seeking the favor of men, or of God? Or am I striving to please men? If I were still trying to please men, I would not be a bond-servant of Christ.

2 Timothy 4:1-4

1 I solemnly charge you in the presence of God and of Christ Jesus, who is to judge the living and the dead, and by His appearing and His kingdom:
2 preach the word; be ready in season and out of season; reprove, rebuke, exhort, with great patience and instruction.
3 For the time will come when they will not endure sound doctrine; but wanting to have their ears tickled, they will accumulate for themselves teachers in accordance to their own desires,
4 and will turn away their ears from the truth and will turn aside to myths.

True godliness is a sincere feeling which loves God as Father as much as it fears and reverences Him as Lord, embraces His righteousness, and dreads offending Him worse than death~ Calvin