The author of the article continues that the rebels didn't care about the chemical weapons either.
Finally, whether by chemical weapons or by conventional weapons, the violence against civilians in Syria has gone on too long and it must stop. An agreement on the destruction and removal of chemical weapons is not a substitute for a political solution. The 100,000 or more dead Syrians makes it gravely clear that a political transition is urgently needed to end the violence.
But instead of celebrating the recent deal to destroy chemical weapons, many rebels felt betrayed. So betrayed, in fact, that they joined the rebels’ most extremist, al Qaeda-linked groups in the north.
Recently on NPR’s Morning Edition a so-called moderate Syrian rebel spokesman admitted that the rebels didn’t give a tinker’s damn about chemical weapons. The rebel aim all along has been to sucker the U.S. into intervening on their behalf. When the U.S. and Russia brokered a deal to destroy Assad’s chemical weapons, some “moderate” rebels immediately joined the side of America’s real enemy. And I don’t mean Assad.