The ultimate goal is to put an end to the risk of War/armed conflict on the Korean Peninsula.
The North Korean government is also not very nice, and has a long history of human rights violations, and heavy handed tactics to stop dissent within the country. It is also, along with Iran, a state sponsor of Terrorism. The NK government may not act rationally in trying to defend itself. The NK government has previously threatened to launch Nuclear Missiles to US cities.
Simply put, it is unacceptable for the NK government to have nuclear weapons capable of hitting targets allied with the United States. It appears to be the goal of the NK government to develop technology capable of hitting targets located in the US mainland.
The United States government does not act the same way the NK government acts, not by a large margin. When the US goes to war, it goes to great lengths to prevent civilian casualties. Wars, and military conflicts the US has been involved in over the past century have had the goal of solving other peoples problems, such as overthrowing tyrants, and dictators, and to stop the spread of communism/socialism, that has killed hundreds of millions of people over the past century.
The ultimate goal is to put an end to the risk of War/armed conflict on the Korean Peninsula.
The American government is also not very nice, and has a long history of human rights violations, and heavy handed tactics to stop dissent around the world. It is also, along with Saudi Arabia, a state sponsor of Terrorism. The US government may not act rationally in trying to defend itself. The US government has previously used Nuclear weapons and invaded countries without provocation.
Simply put, it is
unacceptable for the US government to have nuclear weapons. It appears to be the goal of the US government to deploy technology capable of hitting targets located in DPRK
The DPRK government does not act the same way the US government acts, not by a large margin. NK doesn't go to war, so it doesn't have to pretend it goes to great lengths to prevent civilian casualties. Wars, and military conflicts the DPRK has been involved in over the past century have had the goal of defending itself from American invasion and occupation
It is important to understand that NK already gave such denuclearization promises multiple times and every time they failed their promises as soon as they got some benefit.
This time looks exactly the same: Trump tried to force China not to export any oil to NK and this time China was ready to do it. As we know the economy of any country is not working without oil and NK is not an exception so Kim decided to start a conversation... Again...
Well, as we see not their dialogue failed and everything goes the same way as it was before.
"Stop defending yourself and we will let your people eat" is not diplomacy, its more like extortion