sorry you just don't understand how the world works. nobody is ever starting a war over twitter, not least because people understand that accounts can be hacked. and the president's twitter account tweeting about a war would mean the president gets a call within 2 minutes. it would never happen.

north korea would absolutely never initiate a war over a tweet, they're fully rational.

also nice link to an article about a tweet that the president actually wanted to send, as opposed to a hacker tweeting, which would be denied by the white house within 15 minutes.