As Jiang Huang made that statement his eyes were lacking the craziness he had displayed all throughout. His eyes were tranquil, eluding to his state of mind, which meant whatever remarks he had made towards the end of his statement, they were not strictly fueled by his anger for what happened to him, but rather something he truly believed in.
His thoughts on the matter would have likely been the same even if he wasn't the one involved, and there were some in the courtroom, if not most, who agreed with his sentiments.
Without irreconcilable enmity, it was considered taboo to interfere with another cultivator when they were close to a breakthrough or when they were in a state of epiphany.
These were things that any cultivator with self-respect would not do. It was one of the unspoken rules of the cultivation world, and what Lin Duyi and Yao De had done touched on that taboo.