Let's drop our personal biases here for a moment. I have no dog in this fight, have never watched the show so really have no prejudices in that respect. However this is not about whaling, or anti-whaling activities, but a collision at sea. For purposes of keeping this as objective as possible and saving space lets refer to the Shonan Maru as Vessel A or just A, The Ady Gil as Vessel B and the Bob Barker Vessel C.
We have two videos of the event, one from the Bob Barker and the Second fron the Shonan Maru.
From C you can see A make two distinct course changes, the first two starboard right at B, the second to port keeping her bow on B. At the last moment before impact B does make a quick move forward.
From A we see B sittng 10 deg. and about 30 yards off the starboard bow making no weigh. A's bow begins to drift to right indicating a starboard turn, we hear the helm's collision alarm, but no collision warning is sounded by A. We see a fire hose stream being directed at B and then at the last moment prop wash behind B a moment before impact and then the collision and the wreckage of B slipping down the starboard side. From C we see another hose being directed at the wreckage, but from A it looks like the stream is from a stationary hose that passes over the vessel.
Take your time and decide first if my conclusions are right, then decide about the collision. But for honesty's sake, keep your own biases about the Whale wars out of it.