Why didn't Kuimu Wolf hate the Monkey King for killing his son?

Because the Monkey King got out of big trouble for him, he should thank the Monkey King. The reason is dogma. Heaven forbids immortals to marry mortals, let alone have children. The jade emperor's sister has been kept under Taoshan Mountain for many years, not to mention other gods. It is a great sin to get married and have children in the lower world, and the jade emperor's treatment of the wood wolf is only to punish the old gentleman.

The reason is that the lower bound of Kuimu Wolf was acquiesced by the Jade Emperor, which made it difficult for Tang Priest to learn Buddhist scriptures. Therefore, the crime of descent can be lightly sentenced, but the children on earth must be disposed of, after all, they can't bear to do it. Fortunately, the Monkey King did this wicked man, and actually helped Kuimu Wolf solve a big problem. Sure enough, it wasn't long before Kuimu Wolf was reinstated, and he was ordered to help the Monkey King in the lower bound in the war with Huangmei monster.

The reason why the Monkey King killed the Kuimu Wolf child.

It's all because Guanyin said-"Killing people is your fault; Killing monsters is your merit. " The subtext of Guanyin's statement is that Wukong can kill monsters, which is not only innocent, but also meritorious. If he kills a mortal, he will have to accept some punishment.

Wukong did this only because he listened to Guanyin. These two children are the children of mortals and monsters (Kuimu Wolf descended to earth and became a monster), and their bodies are covered with the blood of monsters, so Wukong would rather kill by mistake than let go.