I too have strong objections to this article. Right from the start he makes a massive assumption saying: "So why does [Dawkins] seem incapable of understanding what Fish is saying?" - how does the author know this. Perhaps Dawkins does understand, but rejects his arguments as false.
From this poor start, things only get worse. Anyone familiar with reviewing WT publications will recognise the fallacies in this article.
I cannot claim to speak for Dawkins himself, but I can speak for myself as an atheist and a humanist, and I will draw on some arguments advanced by Dawkins, Hitchens, Harris and others.
If we grant the existence of a deity, the christian still has all his work ahead of him. Sam Harris asks - if the whole population of the planet suffered a simultaneous amnesia, at what point would we discover that Jesus was born of a virgin, or Muhammed flew to Jerusalem on a horse, or Moses spoke to a burning bush ....? How will you distinguish which set of myths are true? However, scientific knowledge would be rediscovered in time.
Whether God exists or not does not affect the principles by which I live my life. My life is lived based on principles rooted in human values and search for truth. Suppose God appeared to me and asked me to kill my son (a la the Abraham story). I would have indisputable evidence for his existence, but it would not change how I live. A celestial dictator is still a dictator and should be treated just as any other dictator, benevolent or otherwise.
If moral truth and meaning depend on a god to establish them, then you admit to life having no intrinsic meaning. If moral truths are universal and independent of God then God is irrelevant and unnecessary.
One last point, written from Dawkins perspective - The only process that we know of that can produce complexity from simplicity is Darwinian natural selection (a crane). Intelligence appears late in the history of the universe, not at the beginning. If we were approached by a vastly superior intelligence (that some may call God) then it too must appear late and be the result of a long process of natural selection. A creator, a "sky god", who is eternal, always existing, is a sky hook - a non-explanation.