Druids: "Hey, this is our grove. You refugees can't be here because you're making things more dangerous for us."

Tieflings: "But we're refugees running for our lives. You have to let us stay. Hmm. Maybe if we got rid of Kagha."

Also Tiefliings: "Aradin, you can't come inside the grove because you're making things more dangerous for us."

Aradin: "But we're running for our lives!"

--So they're running for their lives, just like the tieflings. But they're expected to die nobly and get eaten by goblins because... they should be saving the tieflings. But the tieflings shouldn't be saving them. And the druids should let the tieflings stay because... they should be saving the tieflings. While the tieflings are considering getting rid of Kagha; in fact, they're open to paying someone to do it.