It depends on what your opinion is and what you mean by respect.
If your opinion is not well explained or backed up by evidence/logic and isn't something completely subjective, what is there to respect?
If your opinion is reprehensible, downright stupid, or ignorant? You have access to the entire base of human knowledge and are still ignorant, so what is there to respect?
Your opinion is completely logical/uncontroversial or is well backed by evidence? Where does respect come into it?
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