Well-said. It's all about epistemology. So many people are afraid to examine their epistemology or the foundation on which they build everything they claim to know. As an ex-Muslim who has converted to Christianity after almost becoming an atheist, I can testify to how important epistemology or the theory of knowledge is.
Every theory of knowledge presupposes something about the metaphysical nature of this reality and if you get that wrong, then not only your epistemology is suspect, but so is your logic and therefore ethics. Out of the many conversations I've had with different people I disagree with, almost all of them seem to have a very hard time understanding this.