Wilshaw and teacher bashing; what does it mean?

Michael Wilshaw is the head of OfSTED and since coming to office has set about alienating and attacking teachers with what can only be described as a sense of twisted relish. ┬áHe came into office proud of his ‘Dirty Harry’ image and eager to present this aspect of his personality to the media (http://www.bbc.co.uk/news/education-15537037). This