DId you know that Goblin Slayer is a counterpart of the popular dark series of the Re:Monster. According to the author, he is very upset at what the story vexing to. Raping and ravish innocent women is out of his league and considered as a wrong depiction of humanity. Thus, he used his knowledge and asked for assistance from the great directors and his friends to create a series that will show that "Rape is considered as a traumatic and horrific blow to the victims. It is not funny to make a series that makes Goblins good than humanity."
Reference:
https://www.youtube.com/watch?v=0sN0p3xsork