Yes, Hitchens knows NOW - but, while still alive, he obviously suppressed and rebuffed the truth that God had already offered Him, so instead of yearning and seeking more, he chose to stay mired in his unbelief. I'm thinking that Jesus standing in front of him doing miracles wouldn't have been enough - lots of people in the New Testament saw Jesus do miracles, and yet remained unrepentant.StMonicaGuideMe said: "And as for Hitchens, well, he's dead now. So, he knows."
Related to the above, I find the parable of "Abraham's Bosom" to be quite interesting. So often, we tend to think that if we had just the right apologetic information or some exceptional evidence to give someone, that it would spur them to believe in Jesus. But Scripture refutes that - certainly for anyone who has access to Scripture.
(Father Abraham, in Luke 16) "He said to him, ‘If they do not hear Moses and the Prophets, neither will they be convinced if someone should rise from the dead.’” What this tells us is, that for those determined to hold tightly to unbelief, no evidence, no matter how powerful, will be enough to make them believe.
This is why so many brilliant scientists can observe the unfathomable design built into the universe, its countless extraordinary systems and components fitting together in mind-boggling precision and harmony, of such awesome design, to make life possible - and yet, they can attribute it all to pure, blind chance. A universe with God's fingerprints all over it, but they can't see His hands? How sad. But they COULD see His hands if they wanted to - they just don't WANT to!