But though the MNLA has a secular nationalist bent, the rebellion in the north is helping Islamist extremists expand their foothold in the country. The MNLA has been in a loose partnership with Ansar Dine, an Islamist group led by Iyad ag Ghali, a Tuareg who led a major rebellion in the 1990s. Ag Ghali's career is a testament to the tangled web of alliances in the region: His most recent gig was in Libya, where, according to reports, Libya's transitional government encouraged him to lead a large-scale defection of Tuareg fighters from Muammar al-Qadaffi's security forces. Ag Ghali obliged,...