en_tn_lite_do_not_use/mat/12/25.md

Every kingdom divided against itself is made desolate, and every city or house divided against itself will not stand

These two statements emphasize that it would not make sense for Beelzebul to use his power to fight other demons.

Every kingdom divided against itself is made desolate

Here "kingdom" refers to those who live in the kingdom. Alternate translation: "A kingdom will not last if its people fight among themselves"

every city or house divided against itself will not stand

Here "city" refers to the people who live there, and "house" refers to a family. Being "divided against itself" represents its people fighting each other. Alternate translation: "it ruins a city or a family when the people fight each other"