Glenn Greenwald is talking about Wired vs him but this statement has universal application to criticism:
The party whose conduct is in question attacks the critic in order to create the impression that it's all just some sort of screeching personality feud devoid of substance. That, in turn, causes some bystanders to cheer for whichever side they already like and boo the side they already dislike, as though it's some sort of entertaining wrestling match, while everyone else dismisses it all as some sort of trivial Internet catfight not worth sorting out.