Here is Friedrich Nietzsche's great masterpiece The Anti-Christ, wherein
 Nietzsche attacks Christianity as a blight on humanity. This classic is
 essential reading for anyone wishing to understand Nietzsche and his 
place within the history of philosophy. "We should not deck out and 
embellish Christianity: it has waged a war to the death against this 
higher type of man, it has put all the deepest instincts of this type 
under its ban, it has developed its concept of evil, of the Evil One 
himself, out of these instincts-the strong man as the typical reprobate,
 the 'outcast among men.' Christianity has taken the part of all the 
weak, the low, the botched; it has made an ideal out of antagonism to 
all the self-preservative instincts of sound life; it has corrupted even
 the faculties of those natures that are intellectually most vigorous, 
by representing the highest intellectual values as sinful, as 
misleading, as full of temptation. The most lamentable example: the 
corruption of Pascal, who believed that his intellect had been destroyed
 by original sin, whereas it was actually destroyed by Christianity!" 
-Friedrich Nietzsche