He calls out the Holy name of an alleged fictional character he doesn't believe in to express his non belief:
There are literally thousands of names of fictional characters, any of which he could have called out to express his incredulity over the reality of
the one person he can most Trust and believe in. Yet in his human arrogance and self denial he chooses to denigrate that matchless Holy name insisting on his own sense of perverted reality in disrespectful disbelief of the Truth of Jesus Christ's eternal Salvation which is freely offered to him.
Then he calls those who have accepted that eternal free gift "wackos".