Terrorism, as in intentional attacks by non-state actors against civilians, has increased rapidly since 2001.
In 2014 alone, 13 years after the War on Terror began following the collapse of the Twin Towers, nearly 33,000 people died. The figures for 2015 will eclipse 2014. In the last two weeks, on October 31, a Russian operated airliner went down in the Sinai, killing all 224 civilians. A few days ago, 41 people in Beirut were killed by suicide bombers in crowded streets. Then on Friday night in France, people acting in the name of God turned parts of Paris into a human abattoir.
The symbolism of the attack upon the French was different. This was not an attack on a provocative magazine, a religious building, a heritage site or a Parliament. This was an attack designed to cause maximum terror by the mass killing of unarmed, innocent, civilians. These were people doing nothing more threatening than going to a sports match, a café, or a music venue.
The implications for the refugee problem in Europe are bad. If the attackers intended to cause maximum chaos throughout the region, this will do it. If the reports are correct that a Syrian passport was found on one of the attackers who arrived as a refugee, this will not be an accident.
In a military style operation of this type of sophistication, someone does not accidentally leave their identification documents in their pocket. Islamic State warned they would do this, promising to smuggle many of their fighters into Europe amongst the waves of human misery washing up on the shores of the Mediterranean.