From the investigative work of Max Blumenthal: on moderate Syrian rebel groups

"Despite its unsavory tendencies and extremist ideological leanings, Al-Zenki was until 2015 a recipient of extensive American funding, with at least 1000 of its fighters on the CIA payroll. Charles Lister, a senior fellow at the Middle East Institute who has said his research on the Syrian opposition was “100% funded by Western govts,” has branded Al-Zenki as “moderate opposition fighters.” This August, after the video of Al-Zenki members beheading the adolescent boy appeared online, Sam Heller, a fellow for the Washington-based Century Foundation, argued for restoring the rebel group’s CIA funding. Describing Al-Zenki as “a natural, if unpalatable, partner,” Heller contended that “if Washington insists on keeping its hands perfectly clean, there’s probably no Syrian faction—in the opposition, or on any side of the war—that merits support.”"