Nietzsche thought value destruction could not be avoided, even though it has bad results. He also thought Christianity was a source of this value destruction, and was therefore a kind of nihilism. According to the French writer Gilles Deleuze, he thought Christianity was nihilistic because it was , meaning it has a negative and unhealthy attitude towards living. Religious thinkers have instead thought that nihilism comes from rejecting religion. Some parts of Buddhism have also been called a kind of nihilism, even though other parts strongly reject nihilism. In the 18th and 19th centuries, the word "nihilism" was mostly used against people who rejected religion or believed in nothing. Either way, nihilism is often seen as a word for life-denying beliefs.