But with an open hearing, people would have a much better chance of detecting that the hearing was abused. A much greater chance than with a closed hearing.
As for him speaking? Who cares? Let him speak. The judge can limit the amount of time he is allowed to speak. If he wants to use this time to make declarations, so be it.
Sticks and stones may break my bones but words will never hurt me.
But the surest test for a country's dedication to its citizen's rights is no better demonstrated when applied to someone they really really dislike.