This is going to escalate into a global war if steps are not taken. And all this is going to be the fault of the USA for their rushed actions against Syria, for all we know, the acts of chemical warfare was perpetuated by the rebels who are being funded and and supported by the USA.
With whom to fight? What are you afraid of Russian? If you do not take into account the nuclear weapons of the Russian have nothing to fight. And especially no one. I guarantee that if Syria comes to an open confrontation between Putin will back down.