The remedy is simple.
I just readout that comment again and again, and give answer to every point raised by him. That should satisfy(if he is an open minded person) him and other people who might have similar opinion, but not expressed it. If he is not satisfied, I do not bother. however, there are so many wise readers, who will read both his comments and my answer. They will weigh it and make an opinion in my favour.
On the otherhand, if there is some truth in what he has said, i shall simply accept it and rectify myself.
I don't think there is any otherway, by which we can react.
All sorts of people are there in this world. We cannot satify everybody. But atleast, our talk and behaviour should satify those who are knowledgeble, wise and objective.
A Sanskrit poet Bhavabhuthi (5th century A.D) tells-'Time is unlimted, eatrh is vast,somewhere, sometime, takes birth a person, who can understand me.' WE should have this confidence also.