How is that a miscarriage of justice or a threat? Isn't the judge within his rights to act as he did? Why does he HAVE to go along with some deal that a prosecutor cut?
That doesn't seem like an abuse of power, but rather an exercise of his discretion. If the deal cut isn't a fair one in the public interest, then he did the right thing. And anyone that cops to a crime like that doesn't deserve to be honored with a deal that others (i.e. a judge) deem unfair. In this case, maybe he took the plea so as to not have everything he did come out in detail during the trial. Those revelations could have been horrific.
And I'm not directing these questions to you specifically as a challenge, but rather out of my own ignorance of the specifics of the process in play.