We received two referee reports from the editor, who made a major revision decision. One referee has a long list of comments, while on the whole it is positive towards our paper. But the other one gave only half-A4-page comment with strong criticism on the paper as well as some other works in the community, as you can see as follows, which is very tough.
The manuscript considers proposition. The authors carry out their study in the framework of an approximation. Unfortunately, the approach used in the manuscript is totally wrong since reviewer's scientific objection. This issue representing a pitfall for many researchers in the past (and unfortunately sometimes in the present) is thoroughly described in one reference deleted here, which is an article of another author.
Therefore, I recommend to reject the manuscript. I do not see a possibility to repair it and to reduce it so that it will fit for publication.
After I read the reference provided, I think that the approach used in our work is correct and the results presented are reasonable, because none of which directly contradict with the reference cited by the referee.
My questions are: what is the best practice to respond the editor and how do I refute the criticisms of the referee?
I apologize if my question is too general for this site. Thanks for your help!