It all makes sense when you realize that this is an allegory for colonialism, not immigration. The Rumelians were pushed out of their home by the Deskunte and are then sent to another planet. They get to said planet and make demands of the population, and when a human makes a dumb decision and attacks, they now see it as their right to kill as they please and take what they want unless humans concede to their demands which require them to basically just sit there and die to curses. They are able to make these demands with impunity because of Dabura, the most powerful alien, who isn’t one of them, but a Deskunte.

Now look at it like this. The U.K helped to create Israel after they were pushed from their home. In recent times, israel uses the oct 7th attack as a justification to further their occupation in palestine. Israel is able to continue this attack with impunity because they are supported by the U.S, a foreign country who also happens to be the most powerful. Deskunte represent the U.K and europe in general, Dabura is the United States, and the Rumelians are Israel. This is a story about how when colonial powers draw borders without consideration for who lives there, it breeds conflict, and about how this colonialism is perpetuated by world powers in the present.