Christopher Hitchens peers a bit closer at what exactly was going on when Rep. Keith Ellison, D-Minn., the newly-minted, first-ever Muslim congressman, took his oath of office on Thomas Jefferson's copy of the Koran :
in 1786, the new United States found that it was having to deal very directly with the tenets of the Muslim religion. The Barbary states of North Africa (or, if you prefer, the North African provinces of the Ottoman Empire, plus Morocco) were using the ports of today's Algeria, Libya, and Tunisia to wage a war of piracy and enslavement against all shipping that passed through the Strait of Gibraltar….The fledgling United States of America was in an especially difficult position, having forfeited the protection of the British Royal Navy. Under this pressure, Congress gave assent to the Treaty of Tripoli, negotiated by Jefferson's friend Joel Barlow, which stated roundly that "the government of the United States of America is not, in any sense, founded on the Christian religion, as it has in itself no character of enmity against the laws, religion or tranquility of Musselmen." This has often been taken as a secular affirmation, which it probably was, but the difficulty for secularists is that it also attempted to buy off the Muslim pirates by the payment of tribute.
Read the whole thing here.