Sort of. Like you said, mass terrorist attacks were rare. Things like the Bataclan theatre attack and others have more deaths in a single event than dozens of small events. But it also ignores that a lot of terror attacks in the 60's and 70's and 80's were due to independence movements things like the IRA in Northern Ireland, Basque Separatists, political movements, Communist proxy attacks during the cold war etc. These days, Western Europe is now facing different terrorism in that it is non-European funded, non-European organized with the sole goal of no political change but death and chaos. Also, aside from Ander Breivik's terrorist attack, most have been Islamic radicalist attacks staged, planned from the Middle East especially Iraq, Saudi Arabia and terror cells now working in the country. Saying you've never felt safer is no comfort especially when your own graph is showing a massive increase again. Also, you have to account for the fact that American and European intelligence are much stronger than in the past. How many attacks are prevented by intelligence we don't know about?