I remained silent for days if not more beacuse I knew that I know almost nothing about terrorism and migration, so I believed the wisest thing is to shut up and read. Unfortunately many (if not most) people believe it otherwise. They talk before they think, and once spoken, they use their own words as reference. Now it is enough. Still, I am not giving here a long speech on the roots, causes and victims of terrorsim, just show you what context is. 

AFP's chart on the deadliest terrorist attacks in Europe since 1980

The same chart, but this time showing also details about the terrorists...

And finally, a chart on the deaths from terrorism in the western countries versus the rest of the world...

This is context.