Since the beginning of 2016, ISIS propaganda repeatedly called on Spanish jihadists to take back Spain. It asked terrorists to “reconnoiter airline and train routes for attacks.” It urged followers to “poison food and water” with insecticides.
In July, ISIS started broadcasting videos with Spanish. The quality and syntax of the writing was exceptional, showing command of the language and of Spanish history.
The goal is to conquer Al-Andalus. That is the Arabic name for parts of Spain, Portugal and France occupied by Muslim conquerors (the Moors) from 711 to 1492.