Authors:

We are more inclined to hate one another for points on which we differ, than to love one another for points on which we agree. The reason perhaps is this: when we find others that agree with us, we seldom trouble ourselves to confirm that agreement; but when we chance on those who differ from us, we are zealous both to convince and to convert them. Our pride is hurt by the failure, and disappointed pride engenders hatred.

Charles Caleb Colton (1832). “Lacon: Or Many Things in Few Words, Addressed to Those who Think”
We are more inclined to hate one another for points on which we differ, than to love one another for points on which we agree. The reason perhaps is this: when we find others that agree with us, we seldom trouble