The Jews were never peaceful, which is partly explainable due their struggles. How would you feel when someone takes off your land like they did in '47?
The land switched hands over and over, like all land. It might be unfortunate but it's the way of the world.
The Native Americans took each others lands by force (back and fourth) for thousands of years, in the end someone even stronger came along.
If the Palestinians want their lands back, I say go for it but I'm not going to cry for them when Israel retaliates.