Board Thread:Questions and Answers/@comment-25954624-20150115004105/@comment-25954624-20150223031353

Here is some stuff i collected from around the wiki regarding wicked dwarves 3rd age: the hobbits of the shire encountered an unusual number of strange dwarves from the east who were trying to flee West from Mordor's influence (as was also noted in Bree).[34] [35]  These may have fled from as east as the Iron Hills to further east (and including from the last two places of awakening). It may suggest that the bulk of the good dwarves left the bad lands, leaving any evil ones behind. During the early parts of the Third Age (or at least in legends of the previous), it is known that in some places wicked dwarves had made alliances with the goblins and orcs.[31]  Hobbits of the Third Age are said to have encountered hostile dwarves of which they feared and had little trust.[32]  there were also said to be a different type of Easterlings that appeared during the Siege of Gondor from unknown eastern lands, who were broad, short, and bearded, being most likely Dwarves from one of four Dwarf clans of the Orocarni in the far East. 2nd age: Still loathing the fact that he could not directly control the race; Sauron tried to recover the rings. Two were recovered though it is not known how he recovered them and four ended up in dragon hordes.[27] [28] [29] Perhaps the two were taken from the eastern clans who joined him and of any of other clans that he rallied behind those dwarven kings. Offered promises of greater riches, lands and power, the rings were taken with honeyed words if only they would return the rings (similar to the offer made to Dain in the Third Age) amplified by the gold lust and greed from the rings (they accpted). However they had to have sided with the forces under their own free will (as the rings could not force them to make the choice) The Ironfists were said to be greedy, xenophobic, and warlike clan. At one point they lived in Mount Gundabad, but a dispute with Durin's Folk over rights to the mountain brought the two clans into conflict. The Ironfists developed a jealous resentment towards the Longbeards and they forcibly seized control of the mountain and occupied it for several hundred years. It wasn't until the reign of King Durin II when a great host from Khazad-dum led by King Durin II himself, marched north to Mount Gundabad to forcibly retake the mountain from their renegade kin. After a siege that lasted many weeks, the Longbeards at last reclaimed Mount Gundabad. The Ironfists were driven from the mountain and they withdrew back to their lands in the east. There would be no further contact beween Durin's Folk and the Ironfists following the end of the conflict. Towards the later part of the Third Age, it is believed that the Ironfists still harbored a grudge towards Durin's Folk.

So ultimately i would say there is enough evidence to consider a evil dwarf faction which i would base around the ironfist's since they went to war with the longbeard's.