As the world reflects on the 20th anniversary of the terror attacks in Washington DC and New York, we face a choice. We can try to understand what motivates people to carry out jihadist attacks, which might give us a chance of preventing them from happening again. Alternatively, we can close our eyes and refuse to discuss possible causes, which rules out the possibility of effective preventive action – which means more people will die.
Here in Britain, there is a sort of secret…