Russia say it was never in Turkey airspace
Turkey seems to be against everyone involved in Syria at the moment, except Isis.
Im no fan of the Turkish government at the moment but that is just not true. Turkey has been arresting Isis members since 2013. It has now (late) started bombing isis... and isis have launched 3 terror attacks in turkey killing hundreds.
What turkey is doing is backing the FSA and the Turkmen brigades which is fighting isis and also fighting assad whom russia is backing.