Remember the famous quote (speaker's name escapes me, but he was a top military leader in WWII at the beginning) "When I'm finished, the only place Japanese (Arabic) will be spoken is in hell".
Like Jonah Goldberg said a few months ago (paraphrase) "Terrorists be careful what you wish for, 'cause you just might get it, and you DON'T want jihad with America". From some of the earlier posts here, looks like Al Quaeda has found that out the hard way already.