Role of Christianity in nihilism, just how big is it?

Hey guys, so I had a question - I was watching a few videos where people were talking about the meaning of the death of God. Obviously, the loss of God is massive, but I wondered how big does Nietzche believe Christainitys role in causing nihilism is? Like is society literally saturated in Christianity so much so we need to revaluate from it so deeply? Like, and sorry if this sounds stupid, how responsible is Christianity for creating nihilism? Thanks.