Why exactly are Pantheism and Atheism combined there? One believes in no god and the other believes in a multitude of gods. They're quite different.
Both of you are wrong. Pantheism is the belief that the universe is God. See Baruch Spinoza.Pantheism is not just predominantly polytheism. It is the worship of all gods of different creeds, cults, or peoples indifferently. Due to this context, it can be placed in the religious and irreligious category, depending what form of pantheism you are. This includes monism, determinism, gnosticism, reality, divinity, and finally, the one you describe to have the belief in many gods... polytheism.