During the last round of the indirect Syrian-Israel negotiations in Turkey, the Israeli team could not even guarantee that the next Israeli government would honor the agreed pre-negotiations terms and preparatory steps! Therefore, it appears to the Syrians that such engagement with any Israeli team is an utter and futile waste of time, even if the Israeli teams are sincere in their aim for peace.
The lacking of internal Israeli cohesive agenda and guidelines, binding to successive Israeli governments, is even more problematic from the Syrian point of view, as the Syrians fear the potential for future Israeli governments to renege on even the definition of some terms in an agreement.
We can never be sure as to the future, but Israeli governments record in keeping earlier agreements is fairly good, so far. Rabin’s dovish government kept the peace agreement signed by a former Likud government, and Bibi’s first government kept the peace signed by Rabin with Jordan.
In his first government Bibi also formally accepted the Oslo accords but did all he could to withhold them. For his defense he claimed, not entirely groundlessly, that Arafat did the same.
In current Bibi’s government, Avigdor Liberman tried to evade the Annapolis agreement but gave it up after being publically condemned.