Okay so I've had another 30 seconds to think it over and thought of two more things.
1) There was no jury. Antagonizing the judge is stupid. Antagonizing the judge, when the judge is the one who decides the outcome, is suicide.
2) I wanted to say, that this was a deliberate choice on Trump's part, creating the narrative that everything was rigged, because he knew he was going to lose. That might even be true. But he could have done that to cameras outside the courthouse. And Trump's lawyers disagree as well, or they'd have made that argument themselves. They didn't.
I cannot see a single benefit of Trump doing this. This wasn't an own-goal, this was punching your own goalie in the dick during penalty kicks.
There's more -- Trump is trying to introduce evidence without going on the stand, you can't do that -- but I think those are the big ones.
I'm a bit at a loss why Engoron allowed Trump to speak at all. The man has shown patience beyond what mere mortals are capable of. He gave Trump enough rope to run around the Earth, and still hang himself.