The takfir ideology had been slowly spreading through the Jihadist camps like a virus, binding the various organizations together under a single collective identity and allowing them to divide the whole of the world into camps of belief (them) and unbelief (everyone else). Takfir became a tool to distinguish the Jihadist fighters from those they had left behind in their home countries: if you did not support the jihad in Afghanistan, you were a kafir; if you cooperated with Arab governments, you were a kafir; if you took religious advice from the clerical institutions, you were a kafir.
