Keith- you appear not to understand something very simple.
The people on the convoy knew that the Israelis would not shoot at peaceful demonstrators, because that would destroy their (the Israelis') credibility. After all, they are the heirs of the Shoah, of Exodus 1947, of the Warsaw Ghetto. They would recognise legitimate protest against oppression when it was shown to them. Scene in Battleship Potemkin: "Brothers! Would you shoot your comrades?"

Not brothers, like Tsarists the whole world are just enemies to paranoid Israel. They fired on their own credibility and killed what remained of it.

They saw paint balls because live shots were impossible. They hadn't counted on Israel's crackhead sense of invincibility.