In complete isolation, a goblin could argue that Durkon and Minrah are not to be trusted and keeping Xykon as a beatstick for just a little longer is worth the friendly fire casualties he isn't really inflicting at the moment.

I do not think Redcloak is that goblin. I think his conclusion that Durkon and Minrah were lying about everything that would point to "you should actually cooperate with them" is way more than 50% informed by "I want this to be the case."