Why does Georg not consider himself a poacher in Saki's "The Interlopers"?

Georg doesn't consider himself a poacher because he believes he has a claim on the disputed land.
According to the story, the forest land in question is well-stocked with game, and it has been the subject of much controversy between the Znaeym and von Gradwitz families for decades. In a past judgment, a court awarded the land to the von Gradwitz family, but the Znaeym family has never accepted the decision.

A famous law suit, in the days of his grandfather, had wrested it from the illegal possession of a neighboring family of petty landowners; the dispossessed party had never acquiesced in the judgment of the Courts, and a long series of poaching affrays and similar scandals had embittered the relationships between the families for three generations.

Ulrich von Gradwitz often finds himself patrolling his land in anticipation of encroachments by members of the Znaeym family. Ulrich is determined to keep his sworn enemy, Georg, from hunting in his forest. Fueled by decades of "personal ill-will," he resolves to kill Georg should he ever meet him face to face. To Ulrich, Georg is a "tireless game-snatcher and raider of the disputed border-forest." Georg is equally determined to lay claim to the game on Ulrich's land. As a matter of opinion, Georg doesn't consider himself a poacher because he feels the land actually belongs to him and his family.