The quote from Herbert’s third book, Children of Dune, is not an absolution for the leaders of the state of Israel. Is Hamas responsible for the atrocity it committed. Yes.
Each of party is responsible with the initial act and the atrocities that are continuing today by the Israeli government.
The seeds of future atrocities are sewn by the actions governments take today. The attacks on the twin towers in New York City on 9/11 grew from the injustices the American government made, and the promises that were broken, to the Afghanistan people.