1. The Golan belongs to Syria by international law, so as long as Israel occupies it there is motivation for the Syrians to go to war. They will not succeed, as Sadat failed militarily, but won his Sinai back anyway. Why go through a war to do the obvious? 2. Peace with Syria means also peace with Lebanon, as Asad has achnowledged. 3. Hizballah will be cut off from its arms supplier Iran. Israel controls the sea approaches, has good intelligence, and can stop such arms shipments. 4. Iran will be weakened by losing its northern arm. Hizballah now deploys missiles as an implied threat to Israel if it attacks Iran. 5. Hamas will be weakened. Mashal will be kicked out of Syria, and also no arms to reach Hamas from Lebanon. 6. The Palestinian position in general will be weakened, being last in the peace line with no real state support. They will be easier to deal with. 7. Netanyahu can deliver this peace. He can`t make peace with the Palestinians: Likud is too ideological.
from the article: Report: Syria willing to consider phased Golan pullout