....... that both parties are in the wrong! I can not judge that the SS people were on a terrorist suicide mission. No one can know what is in someone else's mind.
From Wikipedia: Terrorism is the systematic use of terror especially as a means of coercion. At present, there is no internationally agreed definition of terrorism. Common definitions of terrorism refer only to those violent acts which are intended to create fear (terror), are perpetrated for an ideological goal (as opposed to a lone attack), and deliberately target or disregard the safety of non-combatants (civilians).
Footnotes removed.
As a professional mariner, I can only imagine what went through that helmsman's mind as he saw himself bearing down on another vessel, knowing that he had room to get by, and then the Andy Gil made way to block his safe passage when it was too late to maneuver. I agree that by the video taken from in front of the whaler, it appears that he made 2 significant course changes, but as a mariner experienced running in heavy seas, I think that the ocean changed his course, not turns of the wheel. I have been in seas that move a small vessel 30 degrees or more with each passing wave. That's why they call it seasick.
Those of us who drive vessels for a living are taught above all else to avoid a collision, at any cost. If the Andy Gil was towing a rope or a net to foul the props of the whaler, the helmsman/conning officer would have done anything in his power to avoid that situation. If the vessels props are fouled, somebody has to go in the water to clear that foul. Going into cold southern waters is dangerous, and you wouldn't do it if you could avoid it.
In a collision at sea anything can happen. A light carbon fiber vessel like the Andy Gil could easily have been drug under the whaler in a t-bone type collision. I don't know if the whaler had a bulbous bow which might have made it impossible to "keelhaul" the Andy Gil, but if you plan a collision like the situation appears to be here, you must be willing to have the worst happen.
I believe the actions of the skipper of the Andy Gil easily pass the smell test of terrorism. I think that the crew all being topside where they could easily get off the vessel in the event of a collision meant that the Andy Gil was meant to be sacrificed. I think that any prudent mariner knows that the passengers and crew stand a chance of dying in the event of a vessel collision. It passes the smell test for suicide to me too.
I still think it's reprehensible to kill whales. I've dived with Japanese divers in Okinawa and PNG. As a culture and a seagoing race, I find them to have no respect for the ocean. They see it as a obstacle to overcome and control, not as a part of the ecosystem to live in harmony with. Obviously, this is a generalization, but I don't know any individuals from Japan, so I can only go with the behavior I've observed personally. Your mileage will certainly vary.
Frank