COMMENT:
In a Westminster-style, parliamentary democracy such as ours - and one that, despite MMP, remains essentially a two-party contest - it is inevitable that many voters will choose a side and then see nothing but good in the preferred party and nothing but bad in their opponents - rather as though we were supporters of a football team.
Such allegiances are often more tribal than individual. My own family, for example, saw themselves as naturally National supporters - it was in their DNA - and they were shocked when I chose not to follow suit.
Political commentators are no different - there are not many who have not taken sides and are genuinely free from preconception and prejudice. But, for those who want to be taken seriously, it is important that they are seen to be balanced in their comments and ready to acknowledge merit, when they see it, in the views and policies of the party they don't support, as well as errors and deficiencies in those of the party they favour.
A political commentator who recognises no such duty and prefers to take on the role of an "attack dog" for a preferred party is in danger of not only losing credibility - on the ground that every statement and opinion is likely to be invalidated by bias - but also runs the risk of doing a disservice to the party whose cause he is trying to serve by linking it to his own unappealing exhibition of inaccuracy, prejudice, bile and aggression.