The Law of Unintended Consequences is alive and well in the Middle East. Arms that we send to supposed "allies" more often than not end up in the hands of future enemies -- who may very well be the same people. This was apparent when we armed the Mujahedin in Afghanistan to fight the Soviets, only to have the weapons turned on us when the "freedom fighters" were reborn as the Taliban, Al-Qaeda, and Osama bin Laden. It happened again when we backed the Shah in Iran who was deposed by the Ayatollahs; they turned the Shah's weapons to face us (and Israel). At the same time, we were arming Saddam to fight the Iranians, and a lot of the military support we gave him became the Improvised Explosive Devices and small arms that murdered and maimed American troops there.
Now, to make an election issue, Romney and company think we should be doing more for the Syrian rebels. They don't specify exactly what, but the implication is military aid and not water purification tablets. Never mind that these people, should they depose Assad, may very well share their weapons with Jihadists, who seem to be everywhere. You can find more about this HERE and HERE.