While it might be a poly to win Kim over, it comes across that Trump wants to have the same respect through fear that Kim has. That's not a good look for a president. I know Trump likes to make everything about him, but in this case, making it about him is a detriment. There are other ways to stroke someone's ego without saying you want to be like them in some way, especially when that way is being respected as the result of fear.
As an example, Trump could have easily said: "you know Kim is smarter than we give him credit for". There praises Kim's intelligence without saying implying you want to be more like him. Kim isn't a role model for anyone and is not someone that anyone who's sane should look up to in any way.
And what's the alternative? How about stop trying to force the US way of life on the world and mind our own business. North Korea doesn't like the US because it butts into its business. If we stopped caring, there wouldn't be an issue. The US wants to be in control of the entire Asian region and all it causes is issues - much like it does in the Middle East.
I don't really see any reason why North Korea shouldn't have nuclear weapons. It's a way to protect itself from other powers in the region. It's much like the gun owner in the US who wants to protect their property. As long as they don't use the weapon unlawfully, it's fine to have.