Russian entry into Syria precludes options? No it makes it apparent

"Russian entry into Syria has precluded many U.S. options" is a point of view from those who are blind to reality. Putin has volunteered to support his client Bashar al-Assad to protect the Russian naval base in the Alawite region of Syria by the Mediterranean Sea. Russia has no real interest other than that. John Kerry could practice some realpolitik by negotiating with Russia to force their client to move from Damascus to the Alawite region and so protect their asset and let them show their diplomatic effectiveness, just like they were able to to get al-Assad to turn over chemical weapons. Iran may also be enlisted to convince al-Assad to withdraw to the Alawite Shiite region since Sunni Arabs and Kurdish of Syria are not governable by a single sect and certainly not by Shiite Bashar. This line of thinking comes from the realization that Syria is to be balkanized into separate states because its too far gone among its separate sects to contemplate unification.