What is the biblical mandate for such a ministry?
1 Peter 3:15-16 In your hearts regard Christ the Lord as holy, ready at any time to give a defense to anyone who asks you for a reason for the hope that is in you. Yet do this with gentleness and respect, keeping a clear conscience. – All Christians are called to defend their faith and as part of our outreach efforts, we should do it in front of those who question it explicitly or implicitly. This is a very serious and important part of evangelism.
Isn’t it wrong to debate the teachings of God’s Word?
Proverbs 18:17 The first to state his case seems right until another comes and cross-examines him. Jesus Christ argued with people on their beliefs using scriptures throughout his life. So it is not wrong to engage in debates to defend the truth. We should avoid foolish controversies and quarrels but that is not the kind of debates that we are organizing. In our view debates are the best occasion for preaching and teaching and unlike the other occasions during debates, we will get some real hearers who are in real need of teaching. And we also believe that it is one of the best tools to establish what is true.