... letting Kim be seen as an equal...
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That will help Kim back home to persuade his Generals that they are no longer considered inferior and that they should sign on to becoming a participating country of the world economic community.
Best for the people of DPRK and less threat of NoKo being destroyed. Kim was educated in Swiss schools and better understands world views than others in his country who have been fed Communist BS all of their lives.
That was one of the points POTUS team made.
The people of NK have been raised to think of the US as devils that are waiting to invade. They needed to see lots of smiles & an amiable USA with hands extended in peace to overcome a lifetime of conditioning & fear.