When do we consider the "start" of this violence then? 70 years ago when Israel subjugated Palestine? 1980 when the army started killing doctors and children? 2009, using white phosphorus grenades?
No matter how you spin this, Israel started this conflict. Palestinians lived in this area for far longer and before Israel was even a nation-state.
The eye for the eye is not what unfolds right now. "We were wrong at assuming we may live peacefully together and at our ability to defend from your terrorism adequately, so we are now in the process to remove all of your terrorism" it is.
You mean Palestine? And you also mean those war crimes that were totally unprovoked by an occupation, subjugation, and slaughter of so many of them that more than half are under the age of 18?