Whose words are these?

"It is not a question of Mahometanism simply, but of Mahometanism compounded with the peculiar character of a race…They were, upon the whole, from the black day when they first entered Europe, the one great anti-human specimen of humanity. Where ever they went, a broad line of blood marked the track behind them; and, as far as their dominion reached, civilisation disappeared from view. They represented everywhere government by force, as opposed to government by law."