get the hell out of the territories that don't belong to them inclusive of EJ WB & Golan. Then turning away from their criminal past start afresh and honestly seek peace. Chances of this happening are, if not absolute, then pretty close to zero at the moment, given the attitude of the political elite and a large majority of the civil population high on dreams of biblical claptrap. Still one can but hope.
47 killed in clashes between ISIS, Syrian rebels near Turkey border, monitor says (Reuters)
from the article: Former MI chief: Iran has enough material for 4 or 5 nuclear bombs