If Christianity has not been able to fade, it is not because it lacks enemies. Since its existence, it has been the object of attacks of all kinds. Despite everything, it persists. What motivated me to write this thesis was curiosity. After reading a work by Nietzsche (Beyond Good and Evil), many questions arose in my head. For example, why does Nietzsche perceive Christianity this way? Is he right? Did he write several works that were as virulent towards Christianity? What do his commentators say? And above all: Is there anyone who opposed Nietzsche? Without fanaticism, what position should I adopt? These are the questions that have so upset me and which I am trying to answer today.