Those people, once calmed down, are extremely valuable to you. They are a chance to see another side, to improve what you do, to clarify your thinking. This is why you must always mean what you say and say what you mean.
If you really believe in what you write then you can welcome the chance of debating your point. That is not to say you should go looking for a fight, but if a fight finds you then you can be prepared for it.
I love criticism, when it is helpful. If you challenges me on an issue, I may not like what you have to say, but you have a point and you are welcome to it. I will listen, sifting it through my personal value sifter, and maybe you make sense. Maybe I can learn from the criticism. I’ll thank you one way or the other because I value my readers input that much.