Israel is not going anywhere at this point. The Arab or Persian countries are just eventually going to have to accept that fact or the whole area will continue to be a bloodfest. If Syria ended up like Jordan or Egypt I’m sure that would be fine with the Israelis.
Also I think that in the usual manner the belligerence of the Iranian leadership is aimed at keeping their own public behind them. A lot of the younger people have different ideas than the Mullahs.