Having objectivity in our system doesn’t mean our morals are based on objective things.
Is it objectively wrong to kill?
You can’t answer that with a “yes” or “no”, because it depends so much on the subjective situation.
Also, arguments which you say “like, uh, 95% of people”, by guessing kinda devalue your whole comment. You dot need to not write what you were thinking, but instead say something like “they may not be completely objective, but our subjective views are so similar that practically we do have objective morality in certain contexts”.
Which would be true.
The “95% of people believe in basic human rights” isn’t. Utterly naive.