One often contradicts an opinion when what is uncongenial is really the tone in which it was conveyed. — Friedrich Nietzsche
Some people have a short fuse, are highly reactive, and are ready to go to war over anything. At other times, people are tired, frustrated, anxious, stressed, and atypically touchy and contentious. Either way, you conscientiously manage your interactions, emotions, reactions, and behavior in ways that minimize conflict, animosity, and contentiousness.
This doesn’t mean that you hold back, equivocate, or are reluctant to pursue your point of view, opinion, or expectation. To the contrary, you are always assertive, clear, and forthcoming. The point here is that conflicts and disagreements are managed as negotiations and not as arguments and battles. Confrontation and power games are seldom the best choice for resolving friction points and personality clashes. You have far better and more effective tools at hand and take care to use them instead of resorting to emotionally charged war games.