Hi, Rumot.
They are Wahhabi/Salafist....
"http://www.mei.edu/content/saudi-wahhabi-islam-service-uncle-sam"
Dont know who they answer to beyond that they are allied with the House of Saud. As they even exist in the US, there are probably many leaders. In their dirty work in Syria, I would say they answer to Prince Bandar of Saud, who appears to be the main man in the push against Assad.
GZ
