I don't do court interpreting, but as a conference interpreter I would work this like any other job. Simultaneous interpretation keeps you VERY busy, to a point where you don't see the TV cameras, the press or whatever anymore. (I have a few bumps to vouch for that, there's a conference center in Paris that's famous for the slanted panes in the booths...:-) )
I also don't see the ethical dilemma here. This is a trial, not some kind of political rally where people support controversial ideas.
it is a trial, but a political one