And the the danger of assassination being that THAT spills over into public trials (or rather, the lack thereof).
You keep reiterating that the trial is pointless if you already know the result. It's not. It's about establishing a chain of evidence for and by review at that p[oint so that the result may not be disputed by fringe conspiracy theory groups. If the internet and religion have taught us anything it is that memetic virility has jack fucking shit to do with a meme's inherent truth or lack thereof.
As far as getting busted out by his peers. Well imho if a bunch of desert brains can get into the US, and bust him out then the US deserves to have its rep smeared for the break. We've got prisons that make a mideval fortress look like a sandcastle so short of a hundred suicide bombers zerging the place i'm pretty sure it's a non-issue because even at that point he still wouldn't be able to escape. IN fact, it'd pretty much have to a government conspiracy for him to escape from a US prison.
Even then, what? A year, maybe two tops before he gets the rope too by PUBLIC TRIAL. Public, not fair, because fair is a crock of shit to begin with.