http://www.reformation.org/islam-versus-us.html
Here are just 3 quotes from the "Holy" Koran that justifies killing those who do not convert to Islam:
Fight against such of those to whom the Scriptures were given as believe neither in God nor the Last Day, who do not forbid what God and His apostle have forbidden, and do not embrace the true Faith, until they pay tribute out of hand and are utterly subdued. (Sura 9:29).
When you meet the unbelievers in the battlefield strike off their heads and, when you have laid them low, bind your captives firmly. Then grant them their freedom or take ransom from them, until War shall lay down her burdens. (Sura 47:1).
They would have you disbelieve as they themselves have disbelieved, so that you may be all alike. Do not befriend them until they have fled their homes for the cause of God. If they desert you, seize them and put them to death wherever you find them. (Sura 4:87).
At the time of President Jefferson the tribute was GOLD . . . now it's PETRODOLLARS!!