Al Qaeda is apparently none too happy with Iran: http://ap.google.com/article/ALeqM5hH8t6nw74rPniXuvtkzFBo1B3sfgD932N1J82. Or Hezbollah and Lebanon's Shiites, either: http://www.naharnet.com/domino/tn/NewsDesk.nsf/0/6658958CADEB4267C22574BF00092593?OpenDocument. No surprise there, really. Sunnis and Shiites aren't too fond of each as it is, and if one sees the other as committing the unpardonable sin of daring to cooperate with anyone in the West, the "accused" is toast, regardless of whether or not the belief is legitimate.
Frankly, I would love to see Hezbollah and Al Qaeda go at it. Let these human vermin kill each other off. The only fear I have is that the survivor would likely be a much more dangerous capable foe for us.