In a time before time, the god of blood created the universe on a colossal anvil, and then molded the first dwarves with earth, blood, and magma. He also molded the other races out of mud and dust, but he was less than pleased with them. Then He sat back, and as the universe grew older and more peaceful, He grew bored.
He called his children around Him, and said. "Dwarves. This universe grows boring. I will remake it on the forge of creation, unless it becomes less boring"
The dwarves were obviously terrified. And then Urist, the firstborn and the bravest of them, had an idea. He asked His god how could they possibly make the universe less boring for Him.
So He gave His chosen people, the dwarves, their holy mission : to make this world a world of everlasting conflict, so He may escape divine boredom. He gave them their tools of war : the axe, the hammer, the floodgate and the lever, so they may shed blood and magma in His name.
Dwarves worship the stone and earth that surrounds them. Each strike of the pick is a psalm, and each tunnel is a sacrament.
Dwarves worship the fiery magma that they were made of. Magma is a purifying force and therefore they pour it on elves, kobolds, goblins and other less worthy creatures.
Dwarves also worship blood, as one of the elements of life, and shed the blood of lesser creatures because it pleases Him, else the universe will be set upon the anvil of creation to be reforged.
Everything a dwarf does is to please Him.
The song of the pick and of the battle axe is music to His ears. The magma-charred corpse of an elf is food to His hunger. The spilled lifeblood of goblins is drink for His insatiable thirst.
PRAISE ARMOK ! BLOOD FOR THE BLOOD GOD !