So, consider for a moment that person one might disagree with… How we engage them and the story we tell about that interaction turns them into an adversary or an enemy.
An adversary is a sparing partner, a worthy rival.
An enemy is someone you behold with hostile contempt from whom nothing can be learned.
Adversaries can work together to build a healthy community or nation. I doubt that enemies can accomplish this.
A final point: It is difficult to behold someone as an adversary if they behold you as an enemy. It is hard, but it is a grace that we can ask for.