Problem is, theists of reasonable intelligence spend a good deal of time honing and rehearsing their replies to these. They might be slightly uneasy with their replies, but if the alternative is letting go of all they hold dear, then they'll hold to their guns. Catching them off guard is a slightly better tactic.

Or, to put it another way: if there were such a sledgehammer lying around, Richard Dawkins (or some other New Atheist) would be using it right now. Dawkins uses all the points you listed, and more; and the majority of people don't budge.