Most of us are familiar with, or at least have heard of, Friedrich Nietzsche's virulent criticism of Christianity: according to Nietzsche the belief in, and desire for, "another (higher or future) world" and "eternal life" betrays a hatred of this world and real life, of power and beauty, of the animal and the "body," a "slave morality" which essentially consists in "resentment" against everything real, powerful, beautiful, etc. Christian "spirituality" is shameful "nihilism," nihilism in disguise, the central emblem of which is the cross, understood as the very negation of life, with the "will of power" and the cruel beauty it is made of. Nietzsche lumps together Christianity and Anarchism as expressions of the same basic rejection of reality. Btw Christianity is the main, but not unique or isolated target of this criticism: in a sense it applies to the whole Western philosophical tradition, starting from Socrates and Plato, and extends to Eastern thought as well (e.g. Buddhism), although the negative aspect of the latter is less hidden, hence less perverse.
I am wondering about the possible strategies Christianity may use to face this criticism -- inasmuch as it accepts the confrontation, of course. So I'll leave aside ignorance (that of the old man in Zarathustra, who "hasn't yet heard that God is dead"), or apologetic denial.
I can see two opposite ways:
1. Transforming Christianity into a positive, humanistic, life- and reality-friendly religion, by clearing it of its "deadly" dogma and symbols. Sweeping "sin," "repentance," "death" and the cross under the carpet and trying essentially to "look happy" (re: the Nietzschean comment that Christians didn't "look saved"). This, I feel, has been the main strategy so far, in liberal theology and mainstream Christian "communication" at least.
2. Accepting and thinking afresh, in a more lucid way, the negative, anti-humanistic, anti-realistic aspects of Christian tradition, without converting them too hastily into "positive" virtues... considering that it may indeed play an essential, paradoxically liberating, part in human "economy" (both socially and psychologically, for instance), while acknowledging its dangers (especially where it is still in a position to dominate and repress life and creativity).
Side reflection: I often thought that, if I had to give a blasphemous award to the dumbest and most perverse Bible verse, I would grant it to the famous Deuteronomy passage: "I have put life and death before you: you must choose life." Dumb because nobody can have life without death. Perverse because it is, typically, a tyrant's word (it is actually inspired of the Assyrian treaties of allegiance imposed by the suzerain on their vassals): the tyrant knows nobody can break free from his rule without, at some point, choosing death...
Thoughts welcome.