Dar al-Islam Dar al-Harb ( land of islam land of jihad)
As young muslims one of the things we learn during religious studies is the concept of land of islam and land of jihad. Generally depending how its taught and how extreme the mullah or imam is. The concept refers to jihad on land that is not dominated by islam. Obviously the term alone is disturbing as a religion that employes this thought process has basically an imperialistic tendencies at its core which obviously is very scary. But that is for another day.
What is more concerning at least in short term is the Wahhabi Sunnis who adhere to these radical groups like al quida and isis are attacking land under islam. This is very dangerous situation.
Turkey is a perfect example of this. You have a majority sunni country.. you have erdogan who is basically islamist with a tie ruling the state. you have a country where any terrorist attack will for sure kill innocent women and children muslims who are sunni.. a country who is sympathetic to sunni causes and groups in the middle east including many who are fighting in syria. and yet a bomb went off killing many of them.
Basically at this point they are justifying it as if they kill bunch of innocent sunni muslims thats okay cause they will go to heaven anyway and its good enough to kill just one infidel. That means if they ever get hold of any weapon that can cause mass destruction they will set it off whether its dar al-islam (land of islam or not).