Not sure what you mean by “our” friends. I don’t think al Nusra would want to be “my” friend if they knew about the time I spent in Afghanistan. How about you?
Our allies in Syria. The people we are supporting. John McCain's pals. Only we don't call them "al Nusra." It's not really good for American consumption. We've renamed them the "Free Syrian Army" or "moderate Syrian rebels."
Doesn't change the fact that they're Islamist militants and we've thrown our lot in with them.