Many people are grateful for Guan Yu's death, originally in this tragedy it was Sun Quan who handed the knife, and the person who carried the knife was Lu Mengluxun, but with the prevalence of conspiracy theories, more and more people believe that Zhuge Liang was the culprit who killed Guan Yu.

First of all, I would like to say that the people who put forward this view are themselves people with three views that are not correct, who have dark hearts, and have seen too many conspiracy theories and palace fight dramas.
Strategically speaking, Zhuge Kongming's "Longzhong Pair" was not a whim, but after years of investigation and thinking, with the situation of Liu Bei's group at that time, the most suitable situation for them was: Occupying Jingzhou and Yizhou and killing Guan Yu, the "gatekeeper god" of Jingzhou, is not equivalent to handing over Jingzhou to the enemy?
Secondly, before the jiangshan was laid, they began to kill each other? Liu Bang Li Shimin Zhu DiYongzheng and other emperors also waited for Jiangshan to sit firmly before they began to engage in brotherly self-harm and lackey cooking.
And Liu Bei, who had just transitioned to the great victory in Hanzhong, was the opportunity to take advantage of the victory to pursue, and the Wenwu brethren should go hand in hand and win the hearts and minds of the people.
Secondly, with the peerless good character of Zhuge Wuhou, in the case of power tilting toward the opposition, he did not sharpen his sword against Li Yan and Liao Li, and the Nine Tribes, while Guan Yu had great respect for Zhuge Liang when he was alive, and he had not heard of any contradictions.
Guan Yu and Zhuge Liang were grasshoppers tied to a thread, and they could not kill each other until they were stable.