Why is Israel so murderous?

As I write this question the scale of the Israeli lethal slaughter at sea is yet to be clear. However we already know that at around 4am Gaza time, hundreds of IDF commandos stormed the Free Gaza international humanitarian fleet. We learn from the press that at least 16 peace activists have been murdered and more than 50 were injured. Is it now devastatingly obvious that Israel is not trying to hide its true nature: an inhuman murderous collective fuelled by a psychosis and driven by paranoia?.