Israel's Right To Defend Itself Against The People It Is Oppressing

Something we hear every single time Israeli attack the Palestinians for firing rockets over the wall is that Israel has the right to defend itself and of course every nation in the World has that right, including the Palestinians who the Israeli's have been militarily occupying for the past 70 years and that trumps the right of the nation who launches a full out attack because the little guy they have been oppressing dares to throw a few punches back at it.
The mantra often repeated is that if Hamas stopped firing rockets into Israel then peace would prevail but while no rockets have been fired from the West Bank and Mahmoud Abbas acceding to almost all Israeli demands, Israel continue to make military incursions into it, stealing their land and uprooting Palestinians from their homes in a continuation of settler programs, continually adding to the 240,000 settlers illegally living on Palestine's West Bank.
How would the Government of any other nation, and Hamas is the legally elected Government of Palestine, react to being illegally occupied with the occupier blocking essential supplies of food, medicine and moving its own people to live on your land. I am pretty certain that no country on earth would sit quietly and let the occupier go merrily about its way and nobody would expect it to.  
Israel may wring it's hands and say that it regrets any loss of innocent life but it doesn't seem to be going out of its way to prevent it, the present action has seen 219 people, including almost 100 women and children, killed in Gaza so far forcing Israel into a PR exercise to counteract the images of dead Palestinian children being dragged from the rubble of their former homes.
This has gone on for decades and will continue all the time that the Palestinians are criticised more heavily when they fire rockets into Israel than Israel who are an occupying army illegally seizing and building settlements on Palestinian land, defying UN resolutions, killing Hamas politicians, holding over 9,000 Palestinians in its prisons, destroying farms, bulldozing homes and businesses and maintaining a monstrous wall deemed illegal by the international court of justice amongst numerous other human rights violations.
What Israel really want is for the Palestinians to meekly remain quiet while Israel continues to violently colonize their land so it doesn't matter what weak justifications Israeli spokesmen wheel out to try and calm the tide of angry criticisms aimed at them, there is no justification. Israel and its American backers are complicit in one of the greatest atrocities since the 2nd World War.
Your right to defend yourself is on shaky ground when you are defending yourself against the people you have been murdering and occupying for the best part of seven decades.