The hobgoblins don't seem interested in wiping out any of the other species; they seem to have a tentative truce with the gnolls, and the current agreement is to split the minotaur land, if they wipe them out, but the two races aren't willing to openly band together to fight, though they currently have no need to; their lands are just far enough apart, and neither has anything the other really wants. They do offer some coin, and a chance for Ulwei to join them, if they help drive out the minotaur, though.