If we look at the history of Western civilization, we find that Christianity has illuminated the greatest achievements of the culture. Read the new atheist books and make a list of the institutions and values that Hitchens and Dawkins and the others cherish the most. They value the idea of the individual, and the right to dissent, and science as an autonomous enterprise, and representative democracy, and human rights, and equal rights for women and racial minorities, and the movement to end slavery, and compassion as a social virtue. But when you examine history you find that all of these values came into the world because of Christianity. If Christianity did not exist, these values would not exist in the form they do now. So there is indeed something great about Christianity, and the honest atheist should be willing to admit this.
By contrast, does it make any sense to say, as Hitchens does in his book's subtitle, that "religion poisons everything"? Religion didn't poison Dante or Milton or Donne or Michelangelo or Raphael or Titian or Bach! Religon didn’t poison those unnamed architectural geniuses who built the great Gothic cathedrals. Religion didn’t poison the American founders who were for the most part not Deist but Christian. Religion didn't poison the anti-slavery campaigns of William Lloyd Garrison or William Wilberforce, or the civil rights activism of the Reverend Martin Luther King. The real question to ask is, what does atheism offer humanity? In Tonga, as in America, the answer appears to be: Nothing.