- Attack #1: Shift the burden of proof ("Can you prove God doesn't exist?")
- Attack #2: What did God do to make you so angry?
- Attack #3: Can you prove love?
- Attack #4: Pascal's Wager
- Attack #5: Watchmaker and other painter/painting Ray Comfort BS pseudo-arguments
- Attack #6: Since science doesn't know how we got here, it must be God.
- Attack #7: Offer personal experiences (you can't say I'm wrong now...I just *feel* it!)
- Attack #8: Then what do you believe in? (purpose in life, morality, etc.)
- Attack #n: see Ways to Annoy an Atheist
The first step (depending on how threatened the theist feels) is to attempt to rid themselves of the burden of proof. They may also falsely confuse passion with anger and try to use emotional arguments, claiming that the atheist must have been "hurt" by religion in the past. When these attempts fail, the next step is to argue from design. As the nonbeliever will typically use current scientific understanding to combat these weak attacks, the believer's next attempt is to attack science itself, claiming that scientific methods are invalid or flawed and will commonly use the "well, it's just a theory!". Once shown that science works, they resort to the only thing the atheist can't take away from them: personal experience. By the end of the discussion (if both parties ever reach such a point), the theist will throw out an argument from morality and begin considering what would be required to "believe IN" if one doesn't believe in God.
This is in no way a complete list, nor is it a script that occurs at each encounter. As I said earlier, it's the most common arguments that I find believers using to try to justify their unjustifiable beliefs. Yet the nonbeliever usually finds that every counter-attack has the opposite result: the more you show them there's no proof, the stronger they become in their belief! Faith is the evidence of what you can't see or prove. That's how you know, you just HAVE to know, and then you know. Faith (read: ignorance) can prevail.
Tracie Harris (who writes the Atheist Eve web comic) provides a similar list of theistic tactics, though in a different order: