I think that you should check the timeline for his statements before you jump to that incorrect conclusion. Bin Laden is a bit of a historical revisionist when giving excuses for his atrocities - for ten years or more he has been railing against the US attack on Iraq and the presence of US forces in the land of the 'holy sites'. Then, after the fact of the Sept. 11 WTC attack, he adds a sentence or two about Palestine to his anti-US tirade, and you then believe that it was his motivation for laying the groundwork for that attack.
You have seemingly fallen for yet another lie - a big, juicy, Bin Laden revisionist lie - Bin Laden planted it and you have eagerly lapped it up...