My interpretation of the report is that the captain (non flying) was pushing the nose down (without saying I have control) while the co-pilot was pulling the other way. The captain appears to have lost situational awareness, was not monitoring the instruments and was interfering with the controls in an extremely unhelpful and inappropriate manner. They were over the sea so the mindset would appear to have been that there were unlikely to be any obstacles, while disregarding the fact that it might well be difficult to judge height over the water visually, particularly at a high rate of descent. There was the thread about the Westjet 737 which got very low over the sea and of course those about the Air Niugini and the Lionair 737s that actually did crash on similar non precision approaches. So this is by no means an isolated incident.