Why didn't Lin Shu attack Lu Xun?

The vernacular literary movement provoked Lin Shu's counterattack, and he wrote the literary novel "Jingsheng", in which Tian Qimei, Di Mo and Jin Xinyi alluded to Chen Duxiu, Hu Shi and Qian Xuantong, respectively. Why did Lin Shu target the three of them and put Lu Xun aside?

Today, it is natural that Lu Xun is the most famous, and many people do not even know who Lin Shu is. But Lu Xun grew up reading novels translated by Lin Shu, and at that time, his fame was much greater than Lu Xun's.

In Lin Shu's eyes, Chen Duxiu, Hu Shi and Qian Xuantong were all professors at Peking University, which was the highest institution of learning in China, so their influence was great and worthy of being his opponent, while Lu Xun was just a low-level official of the Ministry of Education at that time, and he could not get into his eyes. Therefore, Lin Shu criticized Chen Huqian, but did not take Lu Xun as an allusion object.

Hu Shi advocated "no canon, no confrontation", Chen Duxiu said that "ancient literature is pedantic, difficult, and mountainous", and Qian Xuantong simply advocated the abolition of Chinese characters, all of which greatly annoyed Lin Shu, believing that they were the essence of the destruction of the country, so he had to fight back. As for Lu Xun, although he wrote "Diary of a Madman", it was not enough to shake the status of Wen Yanwen at this time, and Lin Shu naturally did not pay attention to him.