The Skab People are insectoid mutants created after Balki summoned the giant meteor down to Erridose. Starting as normal humanoids, the unfortunates who lived near ground zero were exposed to a poisonous green fog. This caused them to meld and splice with the insects who were also unfortunate enough to live near the impact zone.
As the old saying goes, people fear what they do not know and thus the Skab People were outcast, feared, and shunned by society at large. Left to fend for themselves, this new race of monster turned bitter towards other races and swore their allegiance to the Pit Lords and Balki. Highly segregated, it is almost unheard of to see different types of Skab People in the same tribe.