@Darth Cumulonimbus It's really not, it's honestly pretty straight forward. It all basically started with Czerka Corp arriving to Kashyyyk around the Jedi Civil War, the Wookiees pushed them off and it started this whole Trandoshan-Wookiee conflict, because Trandosha was in talks with Czerka for slaving rights to Wookiees, so them getting pushed off the planet of course caused problems.
So it's pretty clear who the hostile party is, which is the Trandoshans. Even before that lore came about, Trandoshans were just....honestly really all about hunting and enslaving Wookiees, this goes as far back as the late 80s/early 90s material.