We are disputing the title of Mary not Jesus' divinity. Your simple arithmetic to a complex question does not apply here. Neither God nor Jesus are simple. God is eternal and has no mother. Spiritual things are spiritually discerned and the Catholics are lacking in this particular area in which they do not belong. God does not assign her that title so neither should we.
Christianity theology teaches that Jesus was God incarnate from the beginning, not after birth.
If you argue that Mary simply gave birth to "Jesus", the human being, and not "God", then you are disputing the Christian doctrine that Jesus has ALWAYS been God from the moment he was in her womb. Arguing that Jesus was born "only" a mortal man and later "became" God AFTER birth is a heresy called Adoptionism that was debunked in early Christianity, and those who took such a position were excommunicated from Christianity.
If you accept the traditional Christian belief that Jesus was ALWAYS God, including BEFORE birth, the fact Mary gave birth to God shouldn't bother you.
Jesus IS God. You cannot separate the two. It is a basic tenet of Christianity. Therefore, to say, "neither God nor Jesus ARE" is illogical.
Perhaps you meant "Neither God the Father nor Jesus are simple".