Simplify the following text for a Grade 9 native English-speaking person.
Original: Nihilism is often associated with the German philosopher Friedrich Nietzsche , who provided a detailed diagnosis of nihilism as a widespread phenomenon of western culture .
Simplified: Even people who know about Nietzsche call him a nihilist ( someone who likes nihilism . ) But in his books , Nietzsche said that people needed to create their own morals to get over nihilism .