William Ewart Gladstone (1809–1898) was Prime Minister of Great Britain four times: 1868–74, 1880–85, 1886 and 1892–94. He called the Qur'an an "accursed book" and once held it up during a session of Parliament, declaring: "So long as there is this book there will be no peace in the world."
The text of the Qur'an has not changed from the late 19th century to the early 21st. What has changed is the prevailing attitude toward the book. Now it has become a manifestation of bigotry and hatred to see in the Islamic holy book anything but peace and tolerance. But the text of the book remains the same. If it was an impediment to peace in Gladstone's day, it is now. If it is an uplifting exhortation to peace and tolerance now, then it was in Gladstone's day as well.