Treck was actually being over-sensitive, of course. The Alterrans were pretty respectful as long as he wasn't being an arse—which he was, by the way— but even then, they were quite civil.
For an analogy, they were more like secretaries who were tasked to hide the boss from an annoying customer. Distracting, but still respectful.
However, Trek only saw offense. Being played around by people much weaker than he was naturally triggered the arrogant man.
Treck looked at Gochi with greed, already seeing the money. This guy would sell for hundreds of gold in cities!
This… thing… though was now walking with pride, smiling, and it irked him to no end.
Trek followed him to a street with less activity, wanting to make him suffer.
While he could not attack him directly, it didn't stop him from intimidating the thing.
Anyway, even if he did do anything physical, these weaklings wouldn't dare go against them—the superior Village of Guia!
War to start soon, really!