Just like when that same president aided with Kim and declared him innocent of having anything to do with the torture and death of Otto ?
I generally support Trump, but I don't agree with some of his comments regarding Jung-un and Otto. With that said, your characterization as stated here is not exactly what Trump communicated. If you're going to criticize what he said, then you should quote (and link) his exact words and then go from there.
In any event, Trump is trying to keep things friendly with Jung-un in the hopes that an agreement can still be reached. Calling Jung-un what he is and sending him back into his hermit's lair isn't going to make the world a safer place. Although I'm not certain that you care one way or the other about that.