I love the way of thinking you are showing to us, A.M.K
... You are talking about the Middle East- a place where weapons, explosives and equipment for billions of dollars is poured into annually for decades now... from every foreign player that has his interests there. You can probably more easily buy an AK there than a pair of Beats by DRE. A place with such a loyal government forces who often decide to leave their equipment and run like sissies or just join the rebel/terror group they are supposed to fight against. A place that is in endless war from years, where Iraq (where the real origins of the ISIS is) was destroyed and turned into a failed state 13 years ago by G.W. Bush and eventually all kind of terror groups, militias and organizations popped up and started to do whatever they want. Yet you say Turkey armed ISIS.... with weaponry we don't use and we don't have in our inventory.
About the oil that we are buying from ISIS that I can assure you that not even a dollar has been made for the Turkish Treasury from: have you ever heard about contraband? About smuggling illegally oil, petrol, cigarettes, drugs, people and basically everything you can imagine which is actually not that hard on our southern border which is a really hard terrain to guard... just like the US-Mexican border- or the US government is supporting the Sinaloa cartel, huh? Even Assad is buying oil from ISIS but yet you don't say that Assad supports them, right? During the Yugoslav wars Bulgarian mafia was smuggling hundreds of train compositions of fuel to Serbia annually illegally yet you won't say that Bulgaria was guilty for what happened in Yugoslavia?
We are probably the most attacked country by ISIS and yet you say they are our fellas.