There are a few assumptions here. One: Criticism (in the context you mention) implies a desire to see the object of discussion improved rather than destroyed. Two: Criticism of "governments in general" rather than specifically one's own government is vital to democracy. Three: That moderation is being done based around whether something is criticism or not rather than it being backed by evidence or not.

As applied to our situation, all of these are overwhelmingly false and one need only look at this thread to understand that.