The end is starting for al Qaida as a global player. Their movement combined the forces of the Sunni and Shia towards a common goal: an Islamic caliphate in the Middle East. Their goal never included conquering the United States or even Europe.
The attack on 9-11, and later ones in Europe, came from the failure of the radical Islamic movement to convince moderate Muslims to adopt the twisted ways of groups like al Qaida over ideas of the West.
So al Qaida got this idea. "Let's attack the West directly! Then they will take their ideas out of here and everyone will agree with us!" Not very far-sighted, but then these people are living in caves.
Econo-Girl is not saying that al Qaida isn't dangerous, it is. Econo-Girl is saying that al Qaida is falling in on itself. Soon, if Econo-Girl may deign to predict, al Qaida will be riven by factionalism and they will start killing each other. Because that's what these terrorists do. They kill their enemies, and that includes similar but rival factions.
Be prepared for some intra-al Qaida assassinations.