BEIRUT — Syria’s increasingly powerful Islamist rebel factions rejected the country’s new Western-backed opposition coalition and unilaterally declared an Islamic state in the key battleground of Aleppo, a sign of the seemingly intractable splits among those fighting to topple President Bashar Assad.
The move highlights the struggle over the direction of the rebellion at a time when the opposition is trying to gain the West’s trust and secure a flow of weapons to fight the regime. The rising profile of the extremist faction among the rebels could doom those efforts.
Such divisions have hobbled the opposition over the course of the uprising, which has descended into a bloody civil war. According to activists, nearly 40,000 people have been killed since the revolt began 20 months ago. The fighting has been particularly extreme in Aleppo, Syria’s largest city and a major front in the civil war since the summer.