Obama: “Jefferson and John Adams had their own copies of the Koran.”
The primary, if not only, reason Jefferson had a copy of the Koran was to try to understand the Koran and Islam in light of what the Muslim ambassador from Tripoli had told him and John Adams. When asked why Tripoli pirates were attacking American ships and enslaving Americans, the Muslim ambassador explained that Muslims are commanded to do so by the Koran. Jefferson wrote that the Tripoli ambassador told him that “it was written in their Koran that all nations which had not acknowledged the Prophet were sinners, whom it was the right and duty of the faithful to plunder and enslave; and that every mussulman [Muslim] who was slain in this warfare was sure to go to Paradise.”
That’s why Jefferson and Adams had Korans.