Hello. I can’t complete quest “Free our people” because minor faction village already pacified and should not attack.  The previous quest “Rough man’’, which provides pacification, will be finished in next turn after ''Free our people'' was taken. Of course I can load, but possibility reject quest or automatically failure would be better.

You can just raze the quest giver village, and the quest will disappear.

That is true, but this place too far from my territory, near with opponents, so why fighting without purpose? And i'm sad what the reward is gone. Anyway reject a quests would be useful, when too many quests taken.