What are some of the realities that should be considered before going to war with North Korea?
Despite all the bravado and cheerleading by those who believe that North Korea would be a pushover in a war with the US, there are some realities to consider. 
Outside of it's nuclear threat, North Korea has a huge arsenal of missiles aimed at Seoul and Tokyo, capable of totally devastating them. While this may not directly be a threat to the United States, it would result in an economic collapse that would trigger a worldwide depression.  Such are the consequences  of globalism. 
So, those people cheering for war, might want to reconsider. 
Personally I don't believe that even Trump is stupid enough to attack.