So what's with the "neutral" npcs in Hour of Twilight?

Why do the neutral NPCs attack me after the dragons drop you off to run that final gauntlet to the last boss? I kept everyone, myself included, up and alive when healing it on my druid, but on the priest the NPC dazed me so that I couldn’t get out of the boss’ tidal wave. We still ended up getting the kill, but… why tf are these things hostile?