plane, I'm not going to waste my time with this.
I'll concede the following points you make:
1. There were a lot of people on board whose presence was purely symbolic, i.e., not necessary to operate the ship, unload or distribute its cargo.
2. Those people were there solely to make a political point.
3. Those people knew there was a good chance that they would be confronted by armed force.
4. Those people knew that they could be killed in such a confrontation.
At this point, I don't see any difference at all between those people and the marchers at Selma Alabama or the participants in Gandhi's march to the sea for salt. They don't deserve to die and anyone who kills them is a murderer.
The photos of "weapons" were basically photos of anything you would find on a ship of that size. Kitchen knives. Monkey wrenches. Spanners. Ship's railings. Pliers.
I will further concede that some passengers grabbed some of the ship's equipment and used them as improvised weapons. Against people who boarded their ship in international waters without the captain's permission. To repel boarders, in classical nautical parlance.
As to whether the Israelis fired first before the clubs (ship's railings, actually) came out or whether the sequence was (1) a rapelling descent then (2) a clubbing of the commandos by the passengers and then (3) the shooting: I do not really know. The passengers say that the Israelis shot first, then the descending commandos were attacked with pieces of ship's railing, then the Israelis fired into the passengers. OTOH, the body of the 19-year-old boy had been shot four times in the head and once in the chest, all at close range, which doesn't match the story of the Jews shooting from the helicopter. No word on the other bodies that I could find.
Does it really matter? Who really initiated the violence, the Israelis who boarded the ship on the high seas without the captain's permission, or the passengers who tried to beat off the boarders with "clubs" (actually pieces of ship's railing?)
And I'll return to my first question, which I don't believe you ever seriously addressed: if the murdered aid workers were, as you called them, "murderers," then who exactly was it that they murdered?