It also means you could shoot down a plane and there are no witnesses.
There is far more advanced weaponry then missiles or flak cannons (both which could leave evidence if not careful). EMP is also an available technology
Governments are preparing for the cessation of the treaty and for global warming to melt the ice and make available the rich resources and land underneath. Don't be a fool to think they are not preparing in secret. Feel free to Google Chinas expansion and intentions on the continent. You think they are going to stop at the South China Sea?? lololol
Magic is not available as a weapon. Based on the confines of physics we know what is possible, The only practical option to shoot down a plane like this would be by missile, either from another plane or ship. EMP wont take down a C-130, in fact the amazing benefits on EMP's mostly exist in movies. (They do exist, but only useful certain cercumstances)
Then missile systems need to be manned, you dont just shove a missile in the ground and leave it hoping it does its job one day.
But you are saying that they accidentally shot down a military plane from another country after what you describe as a lot of work to locate, position weapons, and track for miles.
That is not what an accident looks like, that is what an act of war looks like