Because it doesn't conform to Ye Baiyi's values. Ye Baiyi is a very, very decent person. From what he learned, Wen Kexing is the master of the late Ghost Valley. He will kill pests indiscriminately for Wulin, and his values are very decent. As mentioned in the question, the poem sung by Master Longyuange was sung by them on the way to bring Xiaolong back to Longyuange. Did Xiaolong say something? Kill and set fire to the golden belt, build bridges and roads without corpses? Such values are undoubtedly seriously inconsistent with Ye Baiyi.

1. Ye Baiyi is a decent figure in Wulin.

Ye Baiyi, as the sword fairy of Changmingshan, can be said to be decent among the decent in Wulin. His values are very positive. Therefore, he can't accept the theory that Xiaolong's good people are not rewarded.

Second, Ye Baiyi is actually simple.

Ye Baiyi lived for a long time, but because he successfully cultivated the Six Laws and needed to stay in Changmingshan for a long time, Ye Baiyi was actually a very simple person. Although he is a decent man in Wulin, there are not a few decent people in Wulin who do evil in the name of decency, but Ye Baiyi doesn't know or understand it, so he thinks that decency is a good man, and Long Xiaoyin's poems are contrary to his cognition.

Third, the psychological distortion of Xiaolong, the young master of Longyuange.

Xiaolong, as the young master of Longyuange, has been disabled since birth. As he grew older, his physical disability could not be cured. So he longed for his father to open the armory and take out the holy book of the valley of imperial doctors through his good friend relationship with Rong Xuan? Yin Yang Shu cured his congenital disability. But his father didn't betray his friends, and opened the armory for him, which caused Xiaolong to feel unloved in the process of growing up, and then he was psychologically distorted and did many things that violated the laws of nature and ethics.

For more about the poem about the preface of mountains and rivers sung by Master Longyuange, why does it make Ye Baiyi sad? Please leave a comment in the message area.