Joby Warrick in the Washington Post:
The torrent of hateful words is part of what terrorism experts now believe is a deliberate, even desperate, propaganda campaign against a president who appears to have gotten under al-Qaeda's skin. The departure of George W. Bush deprived al-Qaeda of a polarizing American leader who reliably drove recruits and donations to the terrorist group...
Friday, a new al-Qaeda salvo attempted to embarrass Obama, a day after the new president announced his plans for closing the prison at Guantanamo Bay. Appearing on the videotaped message were two men who enlisted in al-Qaeda after being freed from that detention center.
It kind of puts things in perspective.