"And it wasn't payback for Iraq. Apparently these idiots don't realize that Bush's illegal invasion of Iraq happened AFTER 9-11."

That's correct. I think the prior poster was confusing Bin Laden's statement about his reasons for the 9/11 attack. In fact he claimed that it was retribution for the American-Israeli alliance, the Israeli occupation of Palastine and invasion of Lebanon:

    "Allah knows it did not cross our minds to attack the towers but after the situation became unbearable and we witnessed the injustice and tyranny of the American-Israeli alliance against our people in Palestine and Lebanon, I thought about it. And the events that affected me directly were that of 1982 and the events that followed – when America allowed the Israelis to invade Lebanon, helped by the U.S. Sixth Fleet. As I watched the destroyed towers in Lebanon, it occurred to me punish the unjust the same way (and) to destroy towers in America so it could taste some of what we are tasting and to stop killing our children and women."

    – Osama bin Laden, 2004[98]