Imagine if Israel and Muslim nations came together to fight ISIS through propaganda and military force (if required).
Imagine how this extremely unusual alliance can open doors to further cooperation.
Imagine the goodwill that would emerge following the demolition of a common enemy that is ISIS.
Imagine the aftermath of goodwill: increased trust, further dialogue on shared interests; genuine push for a 2-state Palestinian-Israeli solution; increased trade; increased employment and education; less biased curriculums and reduction in hate / fear-education; and a shrinking population of individuals who would resort to retaliation and violence to air their grievances.
Imagine what it could be like if Israeli and Arab leaders just said yes to cooperating against a common threat.