You've neglected to include a few other acts of terrorism. How about the 1985 car bombing in Beruit which was carried out by the CIA and which killed 80 people, excluding their intended victim? How about years of "low intensity" warfare carried out by the US backed Contras against the indigenous population of Nicaragra, with the aim of terrorizing the population until they no longer support their Sandinista government? The World Court declared the United States government official war criminals in that instance.
How about the massive carpet bombing of innocent civilians in Laos and Cambodia during the last years of the Vietnam War? Some 3 million dead. According to much of the foreign press, our revered Henery Kissinger should be standing in the war crimes docket at least for that. Then there is the CIA conducted bloody overthrow of democratically elected Chilean President Allende, which resulted in over 3,00 deaths of civilians and the installation of a death squad government which was very much to the United States' liking. Incidently, that blood coup occurred on Sept 11, 1973.
How about the 700,000 Indonesions killed by their own brutal military government with full support of the United States government, both in terms of financial support and supplied weapons? Or the time Kissinger and Gerald Ford visited Indonesia and gave Suharto the go-ahead to invade East Timor, which resulted in the slaughter of over 250,000 innocents? Take the Turkish Kurdish population...the United States turns a blind eye as the Turkish government slaughters tens of thousands of them, today. In fact, we provide the money and the weapons.
Indonesia, Turkey, Nicaragua, Guatamala, Angola, Chile, and many, many more countries are brutal death squad democracies put in place by the United States government over the years. The reason? Because these dictatorships are friendly toward US transnational corporations. Our companies are free to rape their natural resources and exploit their people at will. We pay enormous amounts of American tax dollars to the elite dictators, and they, in turn, provide a "stable" environment for multinational corporations to rake in the profits.
It is a myth that terrorism is a weapon of the weak. Throughout human history, terrorism has traditionally been a weapon of the strong, against the weak and defenseless. The reason this isn't generally understood, is that the strong also control the means and methods of indoctrination within a society.
In the words of Dr. Martin Luther King, Jr: "My country, the United States, is the greatest purveyor of violence in the world." So, if you Americans are really interested in eradicating terrorism in this world, perhaps you should first look to the gigantic beam in your own eye.