Yeah, it's clear why Engoron has been giving Trump a long leash throughout the trial. What's less clear is why he initially denied the request to speak. I don't think it matters legally, but backtracking after the bomb threat will absolutely encourage Trump's supporters to keep that shit up.
As a bit of an aside, man it fucking sucks how much further reasonable district judges have to go to these days to try to protect justice from Trump's cronies at the appellate level. We can probably think of at least a dozen cases off the top of our heads where a judge has prepared a watertight, 100-120+ page opinion painstakingly explaining why the law requires a particular outcome, only to have a circuit panel or conservative SCOTUS majority write some lunatic screed that's the intellectual equivalent of smearing shit over all of the walls while ranting about the Jews. That's not going to happen here (at least not before it gets to SCOTUS) because we're dealing with New York courts, but I think this illustrates just how corrosive an impact Trump and the modern GOP has had on the judicial system generally.