This is a false belief that everything and everyone is God and God is everything and everyone. It considers a tree is God, an animal is God, you are God, etc. Although God is everywhere in the physical universe (omnipresence), He is not everything. Even though He is in a tree or person, that does not make the tree or person God, for He exists separate from nature. Humanity is commanded to worship only God, not idols or any item of nature (Ex 20:3-6, 34:14; Rom 1:21-25).
See also: false religions, monotheism, omnipresent, theism.