If all human beings ceased to exist, would any of the absolute logical and physical truths of the universe cease to be true? I am not a democentricist (someone who thinks the universe revolves around human existence), so I don't believe so. I don't think that 1 + 1 would no longer = 2, or that the nature of atoms and compounds would change, or that the fundamental forces of the universe would be any different.
It is incredibly arrogant of us as a species to say that truth is subjective to our individual opinions. On issues of morality and ethics, opinions are subjective. But on things such as the existence of deity - there cannot be more than one comprehensive answer at once. If there is a single creator god, then if we ceased to exist, that doesn't mean it would cease to exist, or that before we came into being it didn't exist.
Similarly, if there is no god, that woudn't change if we never existed or didn't exist tomorrow.