If Mr Bolton had read a bit further he would have found cables saying that the UK government was telling the US government saying this was a matter for the Scottish government, which happens to be what they were saying in public too.
So saying the UK betrayed anyone appears to be a factual inaccuracy, especially as the current UK Prime Minister was on record at the time as being against it.
His (Bolton’s) main point seemed to be that the US gave up prosecuting the death penalty on the guy, in fact gave up prosecution altogether, to allow Scotland to prosecute him.
Bolton was saying the US should’ve been much more engaged in dissuading the release of the perp.