1Peter 3:15; there really isn’t a case for debating non-believers; most will out debate you and an observer won’t be able to tell the difference between a fool and not a fool...love them into the Kingdom. It’s God’s job to work on their heart, not mine.
Very Wrong. Scripturally Christians are commanded to preach the gospel, and contend for the Truth, and God's honor, as Paul did.
And in so doing Christians are to be instruments of conviction of sin,, righteousness and judgment, but which one may welcome the Truth. Mercy and grace are appreciated in the light of judgment.
And he said unto them, Go ye into all the world, and preach the gospel to every creature. (Mark 16:15)
Beloved, when I gave all diligence to write unto you of the common salvation, it was needful for me to write unto you, and exhort you that ye should earnestly contend for the faith which was once delivered unto the saints. (Jude 3)
Now while Paul waited for them at Athens, his spirit was stirred in him, when he saw the city wholly given to idolatry. Therefore disputed he in the synagogue with the Jews, and with the devout persons, and in the market daily with them that met with him. (Acts 17:16-17)
Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send him unto you. And when he is come, he will reprove the world of sin, and of righteousness, and of judgment: (John 16:7-8)
Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do? Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost. (Acts 2:37-38)
To him give all the prophets witness, that through his name whosoever believeth in him shall receive remission of sins. (Acts 10:43)
And as he reasoned of righteousness, temperance, and judgment to come, Felix trembled, and answered, Go thy way for this time; when I have a convenient season, I will call for thee. (Acts 24:25)
In flaming fire taking vengeance on them that know not God, and that obey not the gospel of our Lord Jesus Christ: (2 Thessalonians 1:8)
And have no fellowship with the unfruitful works of darkness, but rather reprove them. (Ephesians 5:11)