(of a) person who believes that nothing can be known about the existence of God

person unsure that god exists

a person who sees little or no good in anything and who has no belief in human progress (especially showing this by being sarcastic)

nonbeliever

a person who hates people and avoids them

person who hates others

concerning pantheism ( = (the belief in) the theory that God is in everything and that everything is God)

person who does not believe in an orthodox religion