Imagine you would see a fact that contradict your deepest believes, the core of who you are. This fact is uncontestable, is evidence in its purest form, is something that happened and you know with 100% certainty that it happened. But this fact also is against what define you as a person, your most profound thoughts. Either political, religious , philosophical or moral believes, whatever sits deepetin you.
Do you think this evidence would make you change your mind, or not?
I can’t really think of many deepest beliefs that could even be contradicted. The core of who I am isn’t really to have strong opinions on something, but instead to be chill and touch grass from time to time.
Sounds like you (and me) believe that humans are good creatures and will do moral things just because they are moral. Evil comes after from external influences.
What if a study proved, without a shadow of a doubt, that humans have objective morality in the form of a soul. And that this soul is objectively evil and all humans only do good things because we fear repercussions?
I would not believe it.