Perhaps the most critical idea that drives "The Interlopers" is the criticism it levels against the kind of long-standing feuds and property disputes that divide its two main characters. Indeed, note the image on which the story opens, with Ulrich intent on finding and killing his adversary (even as Georg plans much the same). However, any expectation of settling this dispute through violence evaporates when the two get trapped together beneath a collapsing tree.
This experience of shared helplessness instills a sense of camaraderie between the two, and their earlier mutual hostility gives way to a spirit of reconciliation. Both men now come to recognize the foolishness of their earlier feuding, swearing friendship with one another. And yet, as the story approaches its end, Saki's writing takes a bleak turn, as the two men call for help, only to observe the approach of wolves.
In this way, Saki's treatment of the feud reveals how petty and self-destructive this behavior actually is. As the characters reconcile with one another and endeavor to put the feud behind them, they realize that their mutual antagonism had amounted to a waste of time, energy, and emotional resources. Indeed, this sense of ultimate futility is encapsulated in the image that closes the story: the wolves don't care about the feud or about what differences these two men might have had with one another. Here, helpless before the advance of wild predators, the manner of their death reveals the full extent of how meaningless their long-standing antagonism truly had been. Yet, at the same time, it should not be forgotten that their feud was also what brought both men into the forest to begin with and is thus responsible for their deaths.