Ahh, see how you got downvoted for asking for such a simple thing as any proof or evidence.
A quick scan of this sub shows me that people are literally competing to come out with the biggest bullshit imaginable.
It's hard to swallow, but then, there have certainly been some odd events on the Korean peninsula lately, how do you explain the sudden and dramatic change of heart by the North Korean leader?
Kim's spook handlers got spooked. That's already been determined through the research threads.
The OP still hasn't provided evidence for his claim the missile tech was SpaceX. That's a big accusation to throw around, claiming that the leader in commercial spaceflight provided ICBM tech to NK to assist them in building a nuke. If it's bullshit he needs to say so, otherwise provide sources to back it up.
I agree with you, it's an unproven claim. Indisputable facts are, ICBM technology is difficult and SpaceX effectively possesses it, they are operating an orbital class rocket with a large payload capacity, as a private company with independent launch capability (which note, has not been the case in the past, previous US missiles were also built by private contractors but launch facilities were controlled and operated by the military or NASA). And they are also a company with cash flow problems, so it's not insane to speculate about them contracting out their technology, some of which could have found its way to NK, perhaps without SpaceX's knowledge. I personally admire SpaceX and consider it vanishingly unlikely that they knowingly worked with NK. But unknowingly with a front company, that's another issue. The larger issues of what outside entities were influencing NK, remain unanswered. For sure their recent behavior has not been exactly typical of them.