Christianity was saved in Europe solely because the peoples of Europe fought back against the Moslems. By Teddy Roosevelt, US President 1901 to 1909, from his book, Fear God and Take Your Own Part,  1915.

Christianity is not the creed of Asia and Africa at this moment solely because the seventh century Christians of Asia and Africa, in addition to being rent asunder among themselves by bitter sectarian animosities — and sectarian intolerance and animosity stand for most that is evil in Christianity — had trained themselves not to fight, whereas the Moslems were trained to fight.

Christianity was saved in Europe solely because the peoples of Europe fought. If the peoples of Europe in the seventh and eighth centuries, and on up to and including the seventeenth century, had not possessed a military equality with, and gradually a growing superiority over, the Mohammedans who invaded Europe, Europe would at this moment be Mohammedan, and the Christian religion would be exterminated.

Wherever the Mohammedans have had complete sway, wherever the Christians have been unable to resist them by the sword, Christianity has ultimately disappeared. From the hammer of Charles Martel to the sword of Sobieski, Christianity owed its safety in Europe to the fact that it was able to show that it could and would fight as well as the Mohammedan aggressor.

From the book, Fear God and Take Your Own Part, by Theodore Roosevelt, New York, George H. Doran Company, copyright 1915.

hat-tip Scott of the Pacific