Great question!

At this point the blame game is counter-productive.

What's required is an answer to the question:

"How do we somehow rid the world of the threat of WMD proliferation by rogue states?"

NK, Iran, Syria, Pakistan, and even various African states such as Tanzania, Uganda, Zimbabwe, the DRC etc could
be global threats if NK/Iran (especially!) begin to export their WMDs.

A quick browse through the international press was something of a relief. I had thought (wrongly) that the international community would be really put off by Trump's bellicose bragging and American First nonsense.

But some of the Australian, SK, Japanese, and even the British press actually seemed to like it.  No accounting for taste is there?

The best way forward is assemble a First Gulf War-like coalition to deal with Kim first.  Australia, the RoK, Japan, and perhaps the UK might be on board.  But more are needed -- the Poles, Czechs, Slovenians, Ukrainians, Israelis et al
would be helpful.

Thanks!