George Carlin is known for his irreverent attitude and his observations on language, psychology, and religion. He especially likes poking fun at Christianity. Even with his quick wit and seemingly joy of making fun of religion, we did not realize that he was a Ninja until we caught him wearing this Crustianity Ninja shirt. It is unsure what his other Ninja abilities are, but he definitely has the superior intellect of a Ninja.
More information about George Carlin can be found at the sites below.
George Carlin at Wikipedia