Churchill on Islam

In his book The River War, Sir Winston Churchill wrote the following opinion:

Improvident habits, slovenly systems of agriculture, sluggish methods of commerce, and insecurity of property exist wherever the followers of the Prophet rule or live. Thousands become the brave and loyal soldiers of the faith: all know how to die but the influence of the religion paralyses the social development of those who follow it. No stronger retrograde force exists in the world.

My source for this quote is the U.K.'s Daily Mail online. A Brit was arrested for repeating that quote in public.