If someone is insulting, people should report the post rather then insult back. All people are doing is adding to the work a mod needs to do to put a discussion on track, and frankly that is not appreciated.
If you don't like how someone debates, don't engage them.
If you don't think there are other people who share a certain point of view and you simply want to simply dismiss it and call it absurd and nonsense, then you aren't looking for a discussion, nor will you change anyones mind on what appears to be an important topic to you. Silencing a point of view does not make it go away.
Bottom line, there really is no excuse to resort to name calling and insults.