This is true but a useless statistic. Israelis do kill many more Palestinians than vice versa, but Hamas could end the violence at any time, and Israel can't. If Hamas would simply hold all fire, and publicly announce it, Israel would be forced to stop, both by internal and external pressure. If you mistakenly believe otherwise, you really don't know much about Israelis. [Edit: This is only true of the violence, not about the political dispute. But you don't really need to kill people to have a political dispute.]