While there are many places on the Internet insulting tirades are common, I've always thought of Perlmonks as one of those areas where civilized conduct is the norm and not the exception. Any group will have those who deviate from the common culture but here this type of language appears to relatively rare. So this is the place that I come first when I am interested in Perl discussions - either questions or just general information. (I find that I have learned much of what I know about Perl just from reading the questions and answers here.)
Since I, for one truly value the way disagreements are, in general, handled here, I find such language disappointing (and in fact I, myself, find it highly offensive as well) but I don't see this becoming a part of the normal behavior here. And that is what not only keeps me coming back, but also tends to diminish the occurance of such posts.
I do find, hidden behind the language, a concern for the common direction of programming and its implementation in Perl. I would rather concentrate on that and ignore the language of the post.