He speaks through your comm system and orders the elimination of all warlocks, since they've come too close to understanding the "darkness". He also says that they're tainted by the darkness, and that they're plotting against him and the Traveler. You're either a Titan or a Hunter, off on a mission somewhere, away from the tower. Your Warlock fireteam member has their back turned to you, shooting at the enemy. Do you obey the Speaker?