The Western press is a highly-ideologized and mission-oriented apparatus. Demonization is a method they often mobilize against perceived rivals. For that reason, any news sourced from a Western media outlet must be viewed from the perspective of the interests of the very regime that the media outlet is attached to by an "invisible hand."
They played a similar ploy against Saddam. Another one against Gaddafi. If they had any accountability left and their rival had been yet another weak nation, they would die to play it against Mr. Putin. But, of course, size and sources are important. In the end, it appeared that Mr. Putin, despite all vile and sneaky Western media attempts to demonize, became more popular and universally admired, as opposed to Mr. Obama (who is not a bad person, in essence, I believe).
DPRK government is an easy target. Think about the level of isolation they have to suffer from. When the victim is weakened and defenseless, the US will produce lots of Rambos.
When they face a tough nut like Mr. Lavrov, they will back away. Power, the language of power is the only discourse one can engage with them.