First of all, ignore this idiot >>20920074; he's not me and most probably a falseflag.
Now, on nihilism: there's plenty of both personal and dictionary definitions of nihilism. It's a word that can be used in different contexts and under different meanings. It can be lack of belief in society or politics, it can mean lack in belief in religion, or can also just be meant as a synonim for "pessimism", as we see it often used. Now you must understand that Nihilism in this context and in Nietzsche's work, nihilism means "denial of life"; as in a denial of the real world, a denial of the real world for a so-called transcendental world, on which very often (in most "true world" belief systems) everything is perfect and wonderful, as opposed to this world we perceive right now, which is "bad" and not the "true world" that one should care for—therefore our life in this world doesn't matter.
Given the definition of this concept as i presented it, it makes itself undeniable that Christianity follows this line of thought entirely by the book. For the Christian this life right here isn't the one that matters, for there is a world beyond awaiting you, if you're not "evil"—as in, you're not the romans or the rich men the original poor commoners who kickstarted christianity in the very beginning so very hated and wanted to see destroyed. And there we get into the entire subject of Christian morality, the CORE of christian morality, which is that in which the meek, humble, weak and poor are the ones who will inherit this "kingdom beyond", this "kingdom of heaven". Matthew 19:24. It was never about making some "better society" where people do not "sin", that is, do not kill, steal, rob, etc. It was about giving those who were unfortunate in this life false hope—don't worry, your life sucks in this world but this world doesn't matter anyway. For in the true world that's beyond this one, the powerful will be punished, and the weak rewarded. For eternity. You are not opressed—you are the good, the just. And you shall inherit the kingdom of heaven.