I have never heard any person argue that the State is God. The State is a tangible Authority capable of fulfilling its purpose whether it be the Federal Government or the State Government. God is not a physical Authority, God is some sort of psychological Authority--to some.
A citizen sovereign under God is not factual; it is a version of Truth. There are very few Facts in the Universe, and God is not one of them; and neither is the notion that the Gun represents some sort of singular symbolic purpose. The firearm is many things, yes, one of which is the ability of the citizen to defend against Despotism, if it exists or is perceived to exist.