So what?

The Government Chief Whip, Andrew Mitchell, is apparently facing calls for him to resign, following an altercation he had with police manning the gates to Downing Street the other evening.  Can you see a connection, 'cause I'm blowed if I can? Presumably the Prime Minister appointed him as Chief Whip because he considered he had the characteristics necessary for the job, and I'm sure that good relations with the police never came into it.  How does the fact that he bad-mouthed a policemen make him any more or less fit to hold his post?  The opposition of course are out to make trouble, as is their wont - you might even say their job - but the only question relevant to him staying in his job is - is he good at it?  And, given the nature of the post you might think that a tendency to fly off the handle is a plus point rather than a minus one.