We are back to a persons worldview.
If you don't believe in the creator than you'll never see the worldview of those who do, and vise versa.
A religious worldview says that morality comes from God and was reinforced in the laws he gave the Israelites.
Atheist believe that we evolved from an ape and developed morality over time. If that was so why are we regressing and acting worse than wild animals nowadays. Civilization is getting worse not better. In evolution shouldn't things improve not regress morally?
I've had your worldview. I don't now. So I understand both. I'm giving a more nuanced secular perspective than you might get from the average atheist, althought I would not classify myself as an atheist.
And not just atheists think evolution provides a better explanation than the creationist/young earth belief. Many religious people do too.