I actually thought it was kinda an attractive point raised abruptly by Harris near the middle of the debate onward.
He fought fire with fire, a risky move, but if that's what it takes to potentially win the audience over, more power to him.
Clearly, most of the more well-known atheists before him failed in 'winning' the actual debate, so, Harris resorted to Hitchens' emotional and absurdity appeal to even the odds a bit by grabbing at the audience.
I actually read a few informative blogs talking about how to "deal with William Lane Craig" specifically. Pretty funny read.