I wanted to type something really snarky, but I'm trying to be better than that.
So I refer you to the fact that you should still have respect for someone's opinion even if they don't have complete knowledge on it, or to put it your way "You have access to the entire base of human knowledge and are still ignorant, so what is there to respect?".
People are allowed to have opinions that should be respected even though they don't have complete knowledge of a subject