I would think all Christians are apologist. We defend the faith as it is written which works in us to defend us. It is called the Armor of God and is described as putting on and keeping it on . Believers protecting it with all of ones new soul heart and mind. . It is he who proves those who are faithful
Roman 3 I beleive helps establish the rule of proving (on going) The law of faith. His faith not of our own self. A perfect loving law.
For what if some did not believe? shall their unbelief make the faith of God without effect?God forbid: yea, let God be true, but every man a liar; as it is written, That thou mightest be justified in thy sayings, and mightest overcome when thou art judged. Romans 3:3-4 KJ
It is true that some Jews were not faithful to God. But will that stop God from doing what he promised? 4 No, even if everyone else is a liar, God will always do what he says. As the Scriptures say about him,“ You will be proved right in what you say, and you will win when people accuse you.” Romans 3:3-4 ERV
I do believe we must put on the Armor of God but I'm not sure I agree with the interpretation of Romans 3:3-4.
Are you saying all Jews will be saved? Because God's promises include both salvation for the believer but also condemnation for the unbeliever Jew or Gentile alike.
Hebrews 3:12-19 New International Version (NIV)
12 See to it, brothers and sisters, that none of you has a sinful, unbelieving heart that turns away from the living God. 13 But encourage one another daily, as long as it is called “Today,” so that none of you may be hardened by sin’s deceitfulness. 14 We have come to share in Christ,
if indeed we hold our original conviction firmly to the very end. 15 As has just been said:
“Today, if you hear his voice,
do not harden your hearts
as you did in the rebellion.”[
a]
16 Who were they who heard and rebelled? Were they not all those Moses led out of Egypt? 17 And with whom was he angry for forty years? Was it not with those who sinned, whose bodies perished in the wilderness? 18 And to whom did God swear that they would never enter his rest if not to those who disobeyed? 19 So we see that they were not able to enter, because of their unbelief.
4Therefore, since the promise of entering his rest still stands, let us be careful that none of you be found to have fallen short of it.
Holding on to our conviction to the end requires faith. God's faithful in his promise of salvation but also just in His dealings with unbelief.