The older I get, the more I learn about the world and so, the more liberal I become.
I forget who argued it, but I read an argument that the turn to metaphysical monism (which immediately sets up a binary of good-evil) in Ancient Greece is the root cause of many ills in Western culture. That's probably too simplistic, but I can see it being a significant factor.
The problem is that if we say that there is such a thing as goodness, then that means there is also not goodness. The key is to avoid a hierarchical binary of good versus evil that must reduce everything to an either/or. That's what creates so many antagonisms, opposition to discussion, and intolerance and condemnation. Instead, if we see good and not-good on a gradient spectrum, we open up the possibility of dialogue and discernment.