In short, the Arabs are not off the hook in all this.

Yep big time , if I were to give fault percentage wise , I would say.

70% Arab fault.
30% Israeli .

Keep in mind they been killing each other for hundreds of years - and after WWII , Israel been attacked 3 times by Arab neighbors <- most of the occupation came from is called (spoils of war) Goland Heights for example is one of those that Israel claims that it needs for a (buffer safe zone) after all thats where Syria launched its attack on Israel