This "diary" sounds like it was written by the FBI and planted on his computer...
You may have to come to terms with the possibility that the FBI actually has a case supported by evidence obtained through legal means.
But, it is immensely frustrating, even heartbreaking when you consider the cost in human lives, that given the choice between something like Silk Road and Mexican drug cartels, we as a society have apparently chosen Mexican drug cartels, and all the gut-wrenching bloodshed and destabilization they bring.
I'm reserving judgement on Ulbricht the person, but what he did should not be illegal, for reasons ideological, practical, and humanitarian.
But the most reasonable explanation is that an arrogant narcissist (classic Dunning-Kruger) wrote it.
The FBI did not write it.