If you were watching the show that aired after the ramming there is discussion between Capt. Crunch and Wispy Beard that they INTEND to ram the Japanese ship. Piracy pure and simple. Terrorism under today’s definition and just plain STUPID on the high seas. And yes the hippie boat breached the hull above the water line but was still taking on water - putting all on board in unnecessary damage. “nonviolent” not by a long shot. Also the hippies try and foul the propellers of the Japanese ship(s) - again and act of piracy and sheer stupidity in the open sea.
"piracy", a term you like to bandy about is not ramming a ship: it's poor ship handling at best and endangerment to both sides at worst. "piracy" is seizing a vessel and the goods they are carrying. Theft on the high seas; i.e. Somalia.
Interfering with the Japanese violations of law and decency should be enforced by every civilized nation but it has fallen only to the Sea Shepherds because of the Japanese' effective briberies and misuse of the courts.
As far as WW II goes, yes, it's over and we had to expend several hundred thousand young men in the process. We should not forget what the Japanese and the Japanese culture when not contained is capable of: remember the 97 civilian contractors bound with barbed wire and machinegunned at Wake island when they finished using them as slave labor. Remember the 13 Marines taken to Kwajalein and beheaded after they were captured at Makin Atoll. Remember all of the captured aviators murdered at Rabaul and Truk and all the other places they got them.
We could go on - but the war is over and they have completely changed - right?