With volcanic and siesmic activity it's not out of the question to assume that those craters were from the tektonic plates being pushed up around the edges. (Showing the lines and edges of the tektonic plates would help in this regard.)
That and you would think there would be high traces of Iridium along those mountain ranges if created by a comet?
I do however think a lot of that could have happened. Forensic specialists can show you exactly how a crime happened just by examining a crash site or crime scene. Maybe they should be looking at the structure of the ground around Turkey, Norway and Austria/Hungary and make their own conclusions on that.
