This is an interesting piece of history that should be read by those who believe that the U.S. is responsible for Islamic terrorism.
In 1786, John Adams and Thomas Jefferson met with Arab diplomats from Tunisia, who were conducting terror raids and piracy against American ships (Barbary pirates). Writing to John Jay, Thomas Jefferson described what he saw as the main issue and the reason why they were attacking Americans who had done them no harm. The following quote is from Thomas Jefferson.
"We took the liberty to make some inquiries concerning the grounds of their pretensions to make war upon a nation who had done them no injury, and observed that we considered all mankind as our friends who had done us no wrong, nor had given us any provocation. The ambassador answered us that it was founded on the laws of the prophet, that it was written in their Koran, that all nations who should not have acknowledged their authority were sinners, that it was their right and duty to make war upon them wherever they could be found, and to make slaves they could take as prisoners, and that every muscleman (Muslim) who should be slain in battle was sure to go to paradise."