It depends on if you think the effect of such an attack from such a country would only affect the computer traffic passing through. That is, the attack in this case could actually spill over into the real world where you have serious political unrest and violence that could actually affect billions of people — and not just "oh, my computer got hacked," but actual "someone bombed my house, can I stay at yours?" type effects. Given the provocative and sensitive nature of the nation in question, people who don't have computers could feel the effect of this particular MITM attack. It's not likely, of course, but it _could_ affect them. Billions of them.
I mean, I have never tried to get a pilot's license, but apparently if you don't have good enough security in Florida then you can wind up teaching the wrong people how to fly. And then you take a few of those guys and you put them on sufficiently insecure planes. And even though I haven't flown in or out of New York or D.C. in 15 years, three flights that did nearly a decade ago managed to affect (and continue to affect) billions of people. The planes only held a few hundred people and only 10,000 or so were in the buildings, right? Only eight million people live in NYC. The security around a commercial pilot's license in Florida couldn't possibly affect billions of people, right? Again, it's not likely, but ... really, it could be billions.