Albacete vs Hitchens

This is an excerpt of a debate between these two opposites:

http://es.youtube.com/watch?v=Jq08XDbapVI&NR=1

Interestingly, the catholic opponent mentions half way through the excerpt an interesting argument which deserves consideration: talking about miracles, after Hitchens having said that a miracle wouldn't be enough for him to believe in a Christian God (it wouldn't be enough to prove the identity of the miracle-worker), and after agreeing with that affirmation (Jesus points to the imcompleteness of miracles by themselves in John's gospel), Albacete says the following:

"There is one fact upon which he [Jesus] risks everything, in which he was willing to risk the authenticity of who he was... 'the world will believe only to the degree that you love one another; if you break this law, the world is right in not believing any of my claims'"

Although I myself don't believe that Jesus really claimed anything like this about his own messiahship, this affirmation by Albacete makes things (I think) very easy for any opponent in a debate. I mean: if this affirmation is true, do the love between Christians shine as much as would be expected if the Christian message was true? I'll leave the question open...