By the human race. When given the ultimatum of giving up their heroes or being destroyed, humanity told them to GET STUFFED.
We're only told of this, but apparently the aliens sent a troop to invite Darkseid to join the alliance. The team was obliterated, with the alliance only receiving the party's leader's head back. After probing the memories in said head, they got the basic message: "You can invade, but don't destroy it".