Is the bold part OK?

is not clear, exactly, how this message got lost, or whether Trump merely misunderstood the context of the negotiations. White House aides told the Times they are concerned the president does not understand the elements of North Korea’s nuclear program — details with which Kim is intimately familiar — and that Trump “has resisted the kind of detailed briefings about enrichment capabilities, plutonium reprocessing, nuclear weapons production and missile programs that Mr. Obama and President George W. Bush regularly sat through.”

Is the bold part OK? Shouldn't it be "details of which Kim is familiar with"?

Thanks.