Are the Outsiders all to blame?

Their origin and story may be unknown but they (were) known for being loyal to Scar, as it was implied that they had the same 'cunning' and 'darkness' that he had. But are they truly evil to the core, or were they just misunderstood for their loyalty to Scar..? Is it possible that they believe that Simba was a 'rogue' who Nala came back with to overthrow Scar and maybe even kicked them out for their behavior (I can imagine that the Pridelanders would've resented the Outsiders heavily during Scar's reign.) but the Outsiders weren't told who Simba really was, and if they were told, chose to believe that he wasn't as Scar told them he was dead like Mufasa. What do you think? 
