Of course they COULD, but the likelyhood that they actually will be the perpetrators is minimal.
North Korea was not in WWI
It could be North Korea politically.
South Korea's first ever world cup was in 1954, in which they went out on the group stage. Meanwhile, North Korea have only been in two world cups: 1966 and 2010.
The U.S. has thousands of nuclear weapons. It could probably turn the entire world, to say nothing of North Korea, into a nuclear wasteland if it felt like it.
The Soviet Union set it up after they liberated the northern half of Korea from the Japanese during World War II.
No. North Korea did not exist until after World War 2.
No. North Korea did not exist prior to the end of World War II.
North Korea has not won any world cups as yet.
South Korea- although the North now possesses missile technology sufficient to reach Japan and the North Western USA, South Korea is it's main target. They would start a war with South Korea first because they have been at each other for many years. If it would be a world war, then I don't know.
No. The US leads the world in enforcing sanctions against North Korea.
North Korea appears desolate because the citizens are so isolated from the rest of the world. The government of North Korea does not allow much interaction between those people and the world.
With the way things around the World are going, there will unfortunately be a World War 3, and there's a good chance that North Korea will start it.