Though there are obvious differences between the fanatical Christian, the fanatical Mohammedan, the fanatical nationalist, the fanatical Communist and the fanatical Nazi, it is yet true that the fanaticism which animates them may be viewed and treated as one. The same is true of the force which drives them on to expansion and world dominion. There is a certain uniformity in all types of dedication, of faith, of pursuit of power, of unity and of self-sacrifice. There are vast differences in the contents of holy causes and doctrines, but a certain uniformity in the factors which make them effective. He who, like Pascal, finds precise reasons for the effectiveness of Christian doctrine has also found the reasons for the effectiveness of Communist, Nazi and nationalist doctrine. However different the holy causes people die for, they perhaps die basically for the same thing.

—Eric Hoffer
The True Believer