Time and time again the United States attempts to help free a people from tyranny in the Middle East, and time and time again as soon as the government is overthrown the new leaders turn their guns, that we provided, on us.
The Syrian rebels are mostly made up of Islamist, and a veryfew secular individuals.
Islamist:
Leading Islamist thinkers emphasize the implementation of Sharia (Islamic law); of pan-Islamic political unity; and of the selective removal of non-Muslim, particularly Western military, economic, political, social, or cultural influences in the Muslim world that they believe to be incompatible with Islam.
http://en.wikipedia.org/wiki/Islamism
Lets not provide the extremists with weapons that will be used to kill our brothers, sisters, sons and daughters.