I was an atheist just like Zakath!
I don't think that God can't use Bob's ministry or this debate to bear fruit. I don't exactly agree with Billy Graham's evangelistic methods, but I know of plenty of people that have come to Christ after they have heard his preaching.
It sounds that you've kind of gotten defensive, and have started viewing this as an attack on Mr. Enyart rather than a critique of the approach he has taken in this debate.
The first step in me becomming a Christian was watching Bob destroy an atheistic evolutionist on his TV show one night using the exact same arguments he is using in the BR VII.
Presuppositional apologetics don't preclude the use of scientific points and argument. They can be helpful, maybe even compelling.
To however, make that the foundation of your apologetic seems to me to be a warping of priority.
How can you reason 'tit for tat' over details with an unbeliever who's (unless you can provide an alternate biblical explanation for the scriptures that would seem to say this) reason is twisted.
Atheism is an incoherent worldview. It can't provide the parameters for reason. Atheism can't account for reason. It can't account for induction, therefore neither of these things, reason and induction, can be accepted reasonably.
If they can't be accepted reasonably, and they are accepted, then they must have been accepted unreasonably.
Mr. Enyart seems to have granted Zakath neutrality. He is letting Zakath fight him with the sword of reason.
Reason can't exist in Zakath's worldview, so why should Bob let him defend that worldview with reason?
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Good things may come from this debate. God may use Mr. Enyarts arguments to bring people to him, even if he doesn't use the most effective debate tactics. God will use it for good even if Enyart loses the debate. Don't consider this an attack on his motives.
Peace,
Nathan