I can understand the Author might have been inspired by the Orks from Warhammer 40K universe and couldn't incorporate "WAAAGH" and went with "WHAAAA".
WE Humans nerf ourselves because of how strong our united Will and the drive for Perseverance is.
But as soon as we get a common enemy, Ohhhh buddy best believe we have a Literal Space Super-Soldier who is FEARED as "THE DEMON",
Another Man turned Omnipotent and Nih-immortal or Ascended Human who cast TERROR in the very fabric of souls of Demons who hear the name of the "DOOMSLAYER"
The Great Grandson son of William Joseph Blazkowicz the "N*i-Eradicating War-Machine" and another Universe hopper called Cid Kagenoh, and the kid with power of "Non-Fiction" Misogo Kumagawa, The Holy Emperor of Mankind from WH40K, AND let's not forget, the G.O.A.T,The man with the title of "Champion of the Universe", Ben 10,000.