So a NATO member has shot down an aircraft from a coalition fighting Isis.
Maybe it's because the Russians were helping the coalition to beat Isis by supporting Kurds, or maybe it's just that the Russains are helping defeat Isis by destroying oil transportation that annoyed the Turks as they are happy to prop up Isis buying that exact oil.
I'm thinking that the Russians aren't the problem here and that a NATO member is. Are we looking at a 'Vichy Turkey'?