User blog comment:LOTRMod/On the Removal of Diamonds/@comment-25954624-20150105212204/@comment-25344655-20150117050022

"Of the races, Dwarves are the most resistant to corruption and influence of Morgoth and later Sauron."-LOTR wiki

No dwarven clan was allied with sauron. In fact, they were the most immune to the corruptiveness of evil, even beyond the elves in the fact that they were never tortured by Morgoth and turned into Ringwraiths by Sauron. There was a quarrel where the dwarves had an outbreak against each other (Durin's Folk and Stiffbeards I believe) but it was quickly resolved and never evolved into anything. Also in the war of dwarves and orcs they sent warriors from the east (Orocarni) composing of all four clans there. to help destroy the orcs in the misties.