Western governments have treated the problem of growing Islamist extremism across North Africa as one of "terrorism". David Cameron has talked of an "existential struggle", warning it will take decades to defeat.But in reality, the rebels' earlier successes had less to do with hardline jihadist doctrine than with organised crime and drug smuggling. There is strong evidence, moreover, of collusion between the previous and possibly current Mali government and radical Islamist groups.In recent years, western nations have secretly paid millions of dollars in ransom to various Al-Qaida-allied factions for the release of kidnapped nationals. Since 2008, around 50 westerners have been abducted in the region. Eleven are still being held. The biggest beneficiary of this lucrative industry has undoubtedly been AQIM.It is this western cash – $40m to $65m since 2008 – that has enabled AQIM and other factions to capture the north. They bought weapons, especially after the ousting of Muammar Gaddafi, and political allies. The weapons facilitated their capture of Kidal, Gao and Timbuktu; the Malian army fled in disarray.