Anti-government media activists and rebel commanders gave a mixed assessment of U.S.-led airstrikes in northern Syria on Tuesday, saying that some of the Islamic State encampments hit had been evacuated and one building that was struck had been filled with displaced civilians, even as at least one major Islamic State base was seriously damaged and many fighters were killed.

But the greatest damage, they said, may be to the Free Syrian Army, the moderate rebel faction that enjoyed U.S. support for years.

By focusing exclusively on Islamic State insurgents and al Qaida figures associated with the Khorasan unit of the Nusra Front, and bypassing installations associated with the government of President Bashar Assad, the airstrikes infuriated anti-regime Syrians and hurt the standing of moderate rebel groups that are receiving arms and cash as part of a covert CIA operation based in the Turkish border city of Reyhanli.[…]