Here is another fatwah from UBL in 1998 stating that to kill Americans is the individual duty of every Muslim. UBL does more than just offer philosophical bon mots.
http://www.ict.org.il/articles/fatwah.htm
Yes, he lists justifications for what is to come.
That is why they are important.
But he, like Kerry, says very little in a thousand words.
Some might find them threatening, I find then to be signs of mental disorder. And philosophical justification for his own hatred.
If all his grievances now were gone, he would only invent more for self gratification.