A believer who is too uninformed or ill-equipped to refute anti-Christian arguments is rational in believing on the grounds of the witness of the Spirit in his heart even in the face of such unrefuted objections. Even such a person confronted with what are for him unanswerable objections to Christian theism is, because of the work of the Holy Spirit, within his epistemic rights—nay, under epistemic obligation—to believe in God.” [Craig, “Classical Apologetics,” in Five Views on Apologetics, ed. Steven B. Cowan (Grand Rapids, MI: Zondervan, 2000), p. 35].There are two major reasons to reject what Craig says. In the first place he's deceiving himself, and secondarily he's giving Christian believers permission to deceive themselves.
Cognitive biases are known for giving people permission to confirm our biases despite the fact they are false. So we must bring our reptilian brains to heel by demanding sufficient objective evidence that would convince an outsider. The mother of all cognitive biases is confirmation bias. It prohibits people from honestly seeking the truth.
Confirmation bias is the tendency to search for, interpret, favor, and recall information in a way that confirms or supports one's prior beliefs or values. People display this bias when they select information that supports their views, ignoring contrary information, or when they interpret ambiguous evidence as supporting their existing attitudes. The effect is strongest for desired outcomes, for emotionally charged issues, and for deeply entrenched beliefs. LINK.We must question everything. That's the adult attitude. Be adults in your thinking. Children believe whatever they're told. To blindly believe whatever you're told is likely to produce false confidence in false ideas. You must require and even demand evidence sufficient for the claims being made. Period!
In my book The Outsider Test for Faith I argue we should approach our own (usually) indoctrinated religious faith from the perspective of an informed skepticism. This is something Craig utterly failed to do, and he utterly fails to tell others to do so in their search for religious truth:

















