Who's to say that the target of the questions is primarily "intelligent" christians? From what I've seen, most outrage others have over religion is not caused by these "intelligent" ones. If it's targeted mainly at the more ignorant ones then it does makes sense to ask the questions. Their purpose is not to convert someone to atheism; their purpose is to make someone stop ranting long enough to realize they don't have all the answers...
"Words are deeds." - Wittgenstein