All Attack War, No Holding Back.

" Ahhhhhhh how dare they kill the Goblins so ruthlessly, am going to kill you all!"

" (snickered) ohhh please enlighten me boy, so you Goblins are allowed to kill our descendant but our descendants are not able to kill yours, what a joke, let them stay back at your world if they are too weak " The Thrid Elder mocked as he created a Golden Throne in the air and sat on it

Acting nonchalantly as he watched the Tier 1 Blood Dome, though he was pleased with the great Victory that Alec and his siblings have won but there is no way he would show that, after all that was just the Tier 1 battlefield, it won't really make a difference to the Goblins

They could still give birth to more, but the humans could not afford that type of lost and that is why it was more important to get rid of the Higer Tier power that way they are able to eliminate any threat.