The answer lies in the question. When you cut to the chase it's neither a matter of Christianity, nor religion as a whole which are only manifestations, symptoms of a larger all encompassing disease. Faith is the common denominator of all that is evil in the world, whether it be faith in ones favoured God, faith in the system, faith in ones self or worst of all, faith in reason.
To embrace reason is to dispense with faith of any kind and in any thing. Reason has provided us with all that is good in the world and when applied to the development of a sound, rationally based philosophy, enables us to determine what good is, what it's not, and why the good should and must be preferred to and allowed to flourish over evil.
To believe in oneself is not a matter of faith but of necessity. To earn ones right to exist is to take ownership of oneself by acknowledging responsibility for ones own life and destiny. Rationality is not a gift from some imaginary overseer of reality but a choice to realise ones potential to arrive at ones evolutionary destiny and become a fully functional, happy, healthy human being.
Any more questions?