Blind faith in absurdities like Christianity will not be banished from the earth by rational argument but by making religion, and monotheistic religion in particular, a laughingstock. Not shameful, not intellectually irresponsible, even though the monotheistic religions are all those things, but silly. According to Christian testimony, Satan's sense of humor isn't any better than God's: they both take themselves much too seriously.
Silke's answer to the Blasphemy Challenge is a wonderfully profound acknowledgment of the willful stupidity that is blind faith. If there is too much rational argumentation, it rubs off, so that even the basest and most arrogant foolishness takes on an air of respectability. Certain ideas become tacitly untouchable and unquestionable, hence accepted as necessary precursors to "meaningful dialog," as if dialog with a neurotic could be meaningful while the neurotic insists on playing make-believe.
One of Nietzsche's better anti-Christian jibes: the "meaning of existence" only means that there is something at which it is forbidden to laugh. That something has a metaphysical aura, like guilt for a Christian, only means that one should neither look too closely nor that one should make fun. If laughter at something is forbidden, rational inquiry "uninformed" by revelation is also forbidden. For the textually curious: see Friedrich Nietzsche, Section 1, "The Teachers of the Purpose of Existence, The Gay Science.