Richard Dawkins likes to say that atheists and Christians are almost identical. They have both rejected the existence of huge numbers of alleged gods; the atheist just adds one more to that list.
That's kind of like saying Jeffrey Dahmer and I are also almost identical, since there are billions of people neither of us have killed and eaten. Bill Clinton and I are almost identical, since there are so many nations neither of us have been the president of. And so on.
In many contexts, the difference between zero and one is extremely significant.
