....this older paper by ICG provides a succinct background for those unfamiliar with earlier events:

Islamism, Violence and Reform in Algeria

This is the third of a series of briefings and reports on Islamism in North Africa. The first provided general background on the range and diversity of Islamic activism in the region, and subsequent papers examine with respect to particular states, the outlook and strategies of the main Islamist movements and organisations, their relations with the state and each other and how they have evolved. The analysis focuses on the relationship between Islamic activism and violence, especially but not only terrorism and the problem of political reform in general and democratisation in particular.