That appeal would be quickly denied. The Judge is absolutely right: They “are here to hear him answer questions”, not “to listen to what he has to say.” The Judge has a responsibility to keep testimony responsive to the questions asked and relevant to the case, not to let witnesses give monologues about whatever nonsense is running through their heads at the moment.
And this is exactly how they will fuel their appeal. He will say the judge was unwilling to listen to his testimony, and use that quote as evidence.
That appeal would be quickly denied. The Judge is absolutely right: They “are here to hear him answer questions”, not “to listen to what he has to say.” The Judge has a responsibility to keep testimony responsive to the questions asked and relevant to the case, not to let witnesses give monologues about whatever nonsense is running through their heads at the moment.