Oct 19, 2015 - Three Turkish Air Force aircraft breached Greek air space a total of 31 times on Monday, military authorities in Athens said.
I think the shooting down of the Russian Plane makes it very clear whom turkey supports, ISIS. Just across their border is Terrorists supported by Turkey, they are even treating ISIS fighters in turkey hospitals, Turkey has been doing some very strange Blockades (remember when they wouldn't let Kurds cross to assist to retake Kobani? and other links mentioned here - http://www.al-monitor.com/pulse/originals/2014/09/turkey-syria-united-states-kurds-isis-kobani-attack.html#) and attacks which appear to show their hand several times in support of ISIS. Turkey doesn't like the Kurds nor Assad.
With Russia taking out Terrorist factions close to their border gave opportunity to assist by shooting down a Russian plane & a Helicopter. And if you think oh these are just the USA and Turkey supported Rebels fighting Assad, then WHY did they kill the Russian Pilots that ejected?. Since they are ALL fighting ISIS.
Clearly they Are ISIS.