The question of timing here is an interesting one. The leaders on both sides (US and NK) are far from stupid or ignorant. Either side has the means to defuse the confrontation rather than escalate it at this time. Instead both sides seem bent on ramping up the tension. One purpose of this brinksmanship may be to encourage our respective populations to accept (even welcome) circumstances in the future that are more distasteful than the present, but preferable to a full scale nuclear confrontation.
I don't consider myself a conspiracy theorist, but I remain watchful.