Odd, the one time I saw the idol get stolen, the Druids went hostile, and they started to attack the Tieflings, but the Tieflings won that fight, because most of the druids are down in the central grove area, and should go right for you.

Also, it'd been bugging me for a while now, can I please just point out the stupidity of a Druid grove that allegedly has multiple high level Druids in it, but somehow no one in the fucking place knows the create food and water spell? They have access to their whole spell list and can change them when they long rest. It's one of the quintessential care and survival spells. It's bothered me for a while now that the whole crux of the conflict rides on "ran out of food" when that spell exists, and its level three, WHICH A LEVEL FIVE DRUID HAS ACCESS TO.

The druids seem like the kind of bad people who like to be seen to be doing good, so they shelter the tieflings, but they don't actually care about them or like them, so they pull the whole "oops, guess we're out of food" plot to kick them out, so it doesn't make them look bad for kicking the tieflings out.