There is little doubt that President Trump knows that nuclear weapons are not the only serious problem with the leader of North Korea.
Even with the difficulty of getting news, pictures and first hand testimony out of the rogue nation, enough information is available from secret sources, defectors and those who have escaped from NK to compile a clear picture of the worst human rights violating nation in the region.
Many of those detained, incarcerated, beaten and regularly tortured have as their only crime the fact that they are Bible believing Christians. Kim Jong Un, is indeed, the modern eastern version of Emperor Nero.