Earlier quoted context omitted.
That's a lot of assumptions. You could say that the lack of another 9/11 type attack in recent history and the high failure rate of these missiles shows that the US Intelligence community has already overcome this prejudice.
Also, I think it was only in the past few years that everybody finally accepted that North Korea has the bomb. As late as, what, 2013, we were still half-way convinced they were blowing up boxes of high-explosives to fool us. Even in 2016 some outlets were still hedging. Now, maybe the intelligence community came around much earlier. But certainly Congress was still having trouble coming to terms with the reality. Wh…
I think that's an exaggeration. I'd note this 2013 NYTimes article[1], which notes that all US intelligence agencies agreed that North Korea tested a bomb in 2006, but were unable to come to a consensus view as to if they were capable of miniaturizing it enough to put on a missile:
an assessment by the Defense Intelligence Agency that it has “moderate confidence” that North Korea has the ability to shrink a nuclear weapon and fit it into a missile warhead surfaced at a Congressional hearing. That conclusion was disputed by James R. Clapper Jr., the director of national intelligence, who issued a statement later in the day saying that it did not reflect “the consensus” of the nation’s intelligence community.
[1] http://www.nytimes.com/2013/04/13/world/asia/contrasting-vie...