Old joke is old.
Malal shall destroy all the Chaotic Gods!
There is a name whispered quietly and with fear even by the most depraved, the most evil, and the least sane of the worshippers of Chaos. That name is Malal, the Renegade God of Chaos. Any man who dares look within the unholy black pages of The Great Book of Despair, that foul tome held sacred by worshippers of Chaos, would find the following words: "...and he that went before now came last, and that which was white and black and all direction was thrown against itself. Grown mightily indignant at the words of the Gods, Malal did turn his heart against them and flee into the chambers of space . . . And no man looked to Malal then, save those that serve that which they hate, who smile upon their misfortune, and who bear no love save for the damned. At such times as a warrior's heart turns to Malal, all Gods of Chaos grow fearful, and the laughter of the Outcast God fills the tomb of space . . ."
In eons past Malal was cast out from the bosom of Chaos by the other Gods, or else abandoned them of his own volition, no one is sure which. In any case, Malal's relationship to the other Gods of Chaos is a strange one. All Gods of Chaos pursue purposes that are wholly their own, yet only Malal occupies a position so antithetical to the success of his own unfathomable creed. To be a follower of Malal is to be a Chaotic warrior bent upon shedding the blood of other Chaotic creatures. As such, Malal is both feared and hated by the other Chaos Gods. Malal's worshippers, too, are loathed by other Chaotics; they are outcasts beloved by neither the friends nor enemies of Chaos, dependent upon the least whim of their patron deity. Few men worship such a God; fewer still live long in his service. The bonds that tie master and servant ever drain upon the soul of the warrior, and it is a rare man that can loosen the bonds of Malal once forged.
Yeah, Grandfather Nurgle. Father of all things. True chaos is entropy, decay is the realm of Nurgle, all things will be of Nurgle's domain eventually. All things.
The whole problem with the world is that fools and fanatics are so certain of themselves, but wiser people are full of doubts.