User blog comment:Zack Tan/Volume 9 Intermission./@comment-174.138.203.254-20150823194707

The thing is Nazarick has a reason to invade the beastman kingdom even if the queen doesn't ask for help. We've seen on more than one occasion the members of Nazarick have asked for humans to eat or play with and if I've read this correctly the Beastmen have humans just for that. Ainz may just take them down to satisfy that condition.

It's like Carne village agreement with the ogres, as long as they are fed they will not feast on the villagers. A bunch of human hungry Nazarick members surrounded by human countries is certainly something Ainz would want too avoid.

P.S. Sorry if this comment starts an ethics discussion about Nazarick members eating humans