A particularly malignant form of the religion virus hit Paris yesterday when three infected individuals, directed by the virus, tried to suppress criticism of it by killing people who made fun of it. This especially virulent strain of the Islam memetic virus, which can control the mind and actions of its victims, making them do things which no sane person would normally do, is reaching epidemic proportions in parts of the world, especially in the Middle East where the population has suffered from various form of it for centuries.
Like other forms of the religion family of memetic viruses, Islam is normally passed on to children when they are at their most susceptible to infection so in many parts of the world, infection rates can reach almost 100% of the population.
The human infant is almost unique in nature being sentient, keen to learn and understand the world around him or her, having good memory recall and having a long childhood. To avoid the danger of overly-curious and sceptical but naive children being easy prey for predators, humans evolved childhood gullibility so parents could teach children almost anything quickly and without the children doubting them. So, for example, children told by their parents to keep away from the water hole where there were crocodiles didn't go to check for themselves.