I personally blame the failure of the United States, United Kingdom, and United Soviet Socialist Republics for their failure to deal with the humanitarian crisis of 1930s Germany (read: accept all Jewish refugees) resulting in a traumatized stateless people feeling they needed to reclaim their ancestral home by any means necessary as an existential crisis. From there we have seen failure after failure to attempt peaceful coexistence from either side or to attempt safe and peaceful decolonization from the Israeli government or any other world government or for the world to accept Palestinians’ right to create a nation