Russia is telling Iran it is time for the mullahs to leave Syria

streiff:

...
One of the many signature accomplishments of the Obama administration was inviting Russia to take a role in the war in Syria. If one were writing a John le Carre-style novel one could draw a straight line from our withdrawal from Iraq to the rise of ISIS to the Arab Spring to our attempt to overthrow Assad to the rise of ISIS to the increase of Iranian power to using the Russians as our intermediary with Iran to negotiate the now-defunct Iran nuclear deal to a Russian military presence in Syria.

But as Iran’s power has grown in the region and it looks more and more intent upon creating a Shia empire stretching from Tehran to the Mediterranean, it has become an existential threat to Israel. Israel has struck at Iranian bases in Syria and the intermixing of Russian and Iranian assets has now become a liability. Two days ago, Israel told Russia that it would no longer confine its attacks to Iranian targets along the Syria-Israel frontier but would now target them throughout Syria.

Israel has told Russia that it will broaden its military operations against Iranian positions in Syria to include the entire country, an international Arabic newspaper reported over the weekend.

According to London-based Asharq al-Awsat, Israel has decided to expand its “red lines” in Syria and will no longer confine itself to the area near its southern border. Israel has been cited as the source of numerous air and missile strikes in the country on sites connected to Iran and its Lebanese terror proxy Hezbollah.

Now Russia is trying to extract its Iranian client/master (because the Russo-Iranian relationship has Russia both leading and being the toady to the Iranians) from a no-win predicament. Iran can’t stay in southern Syria because they can’t project the force necessary to either deter Israeli attacks or to defend their own forces. They can’t leave, because to be seen as being booted out by the Jews would destroy the aura of invincibility and inevitability that Iran has tried to develop around its march to the sea.
...

There is much more.

As I noted in a post below, the Syrian air force has also told Iran it does not want its troops or missiles around it air bases.   Russia appears to have broadened that hint that it is time for Iran to leave. 

It makes sense from both Russia and Syria's perspective because the rebels are pretty much defeated and teh US has defeated ISIS.  Iran's presence has become a problem to the regime in consolidating its gains.  The US will not leave and allow Iran to take over the area it controls and the Israelis have said they will not allow Iran to have bases anywhere in Syria.