Charlie Brown the existentialist

A thought-provoking analysis of Charles Schultz's Peanuts comic strip as existentialist.
Ultimately, we exist in an abandoned and free state. We are responsible for our actions, and since Sartre argues that there is no God to conceive of a human nature, we are responsible for our own creation.
How does this apply to Peanuts? Like the existential human in a world of silent or absent deities, Schulz