The U.S. abandoned Afghanistan after "Charlie Wilson's War" instead of helping them rebuild the country, cut off the aid as well. He felt this was a betrayal, like a lot of the Muslim world.
The West stood by during the Lebanese Civil Wars, Israel's involvement or spectating during the Christian Phalange Militia of Lebanon attack on the Sabra and Chatilla Palestinian refugee camps. Since the U.S. was a the ally of Israel and it's creator of the state in 1948, he hated the U.S. for helping Israel.
He saw Israel as the invader, the infidel, like the U.S. He hated Israel for helping to destroy Lebanon and hated the West because the weapons came from the U.S. In 1991 during Operation Desert Storm he resented the Saudi Royal Family for letting the U.S. military go into the Muslim holy sites of Mecca and Medina in order to protect the people and the oil fields in Kuwait, which Saddam was burning. He hated the U.S. for intruding on the holiest sites in Islam and he vowed to drive them out, Saudi Arabia didn't feel as he did and after the failed attempt on the Saudi King, he was exiled.
He saw the United States as corrupt, capitalistic, morally bankrupt and greedy.
Bottom line, he was a TERRORIST, he didn't need a reason to hate the United States, but he found many, he's FISH FOOD now.
He felt US (ie, infidel) soldiers massing in Saudi Arabia to protect it from Iraq (which had just invaded Kuwait) and to retake Kuwait was an insult to Allah as Arabia contains the most sacred Islamic sites, was the home of Mohammad, and the origin of Islam attacking all infidels (the aggressions against the Byzantine Empire (Christian) in what is now Israel, Egypt, northern Africa, Syria, Lebanon, and Turkey), Buddhists (India/Afghanistan), and animism (Africa).
Mr Bin Laden and his merry band of psychopaths were cold blooded killers who enjoyed an orgy of murder in Afghanistan and the Balkans. Who knows why he hated America? the Um Cult in Tokyo tried to gas thousands of Innocent Japanese commuters on their Subway, They had actually tried to get their hands on Russian Atomic Bombs to set off one of them in Japan and start WW3. Why? who knows what went on in their crazed minds, one of Mr Bin Ladens followers tried to set off a bomb in New York and slaughter men women and children, cutting them to shreds with slices of scrap metal packed around the bomb. They are all just sick, very sick, people.
Simple answer ,U.S.Never be true to their friends , Shah of Iran in his sickness was removed from U.S. to Panama and died the lonely death in Cairo.
Saddam was betrayed by U.S. after loosing 8 -year ,proxy war, with Iran and he was hung in Baghdad and U.S. not moving an inch to help him.
Hosni Mubarak and his family serve U.S.for long years but left him to fight alone with his own people and finally was overthrown and sentence to life imprisonment in Egypt.
Now come the turn of Osama bin Laden U.S. used him to fight the Ruusian army ousted from Afghanistan with the Talaban and then turn against him by accusing a lot of cook up stories to him . Finally they killed him and throw him in to the sea.
I am wondering right now as Israel is the close associate of U.S. to look after the interest of U.S. in middle east, what would be the final destination of these two countries still to be seen.
In the mid 70's , the us govt took away his yellow cab for no reason.....and he vowed revenge
A mix of Adullah's and Lee's answer.
He got a McChicken instead of a McDouble, and it was cold....you cant blame him, i would hate america too if that happened to me...
If you are talking about the American political and corporate establishment, whats not to hate? The American people are a different matter and no doubt the ones among them with brain cells, also hate these scum.