Just rereading something that maybe it is the religion...
Both Nietzsche and Stirner saw in Christianity the leveler of the human race, the breaker of man's will to dare and to do. They saw in every movement built on Christian morality and ethics attempts not at the emancipation from slavery, but for the perpetuation thereof. Hence they opposed these movements with might and main.
Whether I do or do not entirely agree with these iconoclasts, I believe, with them, that Christianity is most admirably adapted to the training of slaves, to the perpetuation of a slave society; in short, to the very conditions confronting us to-day. Indeed, never could society have degenerated to its present appalling stage, if not for the assistance of Christianity. The rulers of the earth have realized long ago what potent poison inheres in the Christian religion. That is the reason they foster it; that is why they leave nothing undone to instill it into the blood of the people. They know only too well that the subtleness of the Christian teachings is a more powerful protection against rebellion and discontent than the club or the gun.
No doubt I will be told that, though religion is a poison and institutionalized Christianity the greatest enemy of progress and freedom, there is some good in Christianity "itself." What about the teachings of Christ and - early Christianity, I may be asked; do they not stand for the spirit of humanity, for right and justice?
It is precisely this oft-repeated contention that induced me to choose this subject, to enable me to demonstrate that the abuses of Christianity, like the abuses of government, are conditioned in the thing itself, and are not to be charged to the representatives of the creed. Christ and his teachings are the embodiment of submission, of inertia, of the denial of life; hence responsible for the things done in their name.
http://dwardmac.pitzer.edu/Anarchist_Archives/goldman/failureofchristianity.html