Syrian rebel brigades oppose Western-backed group that announced government in exile . three rebel groups call on supporters of the Secular Syrian opposition to embrace Sharia . The 13 rebel groups , led by the al Qaeda-linked al-Nusra Front , also called on supporters of the Syrian opposition to embrace Sharia law `` and make it the sole source of legislation . '' Moderate opposition groups appear to have suffered a series of setbacks a speech Tuesday . Secular Syrian activists have been warning of the rise of Syrian groups .
Syrian rebel brigades oppose Western-backed group that announced government in exile . three rebel groups call on supporters of the Secular Syrian opposition to embrace Sharia . Moderate opposition groups appear to have suffered a series of setbacks a speech Tuesday . Secular Syrian activists have been warning of the rise of Syrian groups .