A peace between Israel and the Palestinians means sunni Syrians will likely start to ask why they are ruled by an alawite minority. Hezbollah, a part of the Lebanese government, is a finished organization if it cannot "confront" Israel, it has no other reason to support its being. For Palestinians to want these rejectionists invited means they don't want peace either, as both Syria and Lebanon will work against any peace.
Five people killed in car crash near Hebron (Haaretz)
from the article: PA: Police deployed in Nablus before receiving Israeli okay