> If I recall correctly, the terrorists attacked the US because they "don't like freedom"
The letter very clearly states that they don't like freedom! It very specifically calls out permissiveness of sex, gays, banking (as every western nation sees it, contra Islamic banking), gambling, alcohol, and separation of church and state as evils:
> (a) We call you to be a people of manners, principles, honour, and purity; to reject the immoral acts of fornication, homosexuality, intoxicants, gambling's, and trading with interest.
> (b) It is saddening to tell you that you are the worst civilization witnessed by the history of mankind:
> (i) You are the nation who, rather than ruling by the Shariah of Allah in its Constitution and Laws, choose to invent your own laws as you will and desire. You separate religion from your policies, contradicting the pure nature which affirms Absolute Authority to the Lord and your Creator.
> (iv) You are a nation that permits acts of immorality, and you consider them to be pillars of personal freedom. You have continued to sink down this abyss from level to level until incest has spread amongst you, in the face of which neither your sense of honour nor your laws object.
Mad we didn't behead old Bill:
> Who can forget your President Clinton's immoral acts committed in the official Oval office? After that you did not even bring him to account, other than that he 'made a mistake', after which everything passed with no punishment. Is there a worse kind of event for which your name will go down in history and remembered by nations?