text: Because when you take a sample that includes 7000 people in six countries, you'll get a more representative sample of the real world, and in the real world McDonald's is a far more widespread business than Christianity.  Assuming you are a Christian, how familiar are you with the symbols that are important to Muslims, Buddhists, Hindus, Jews, Zoroastrians, and the countless other faiths that make up the majority of the world's countless religions? \n\nI'd be willing to bet you wouldn't even recognize many symbols that are important to various Christian sects outside your own.