) is it really surprising when you consider all these tensions were bubbling just beneath the surface. after all in the episode where Tirek, Cozy Glow, and Chrysalis sneak into canterlot to steal some artifact Chrysalis and Cozy glow were able to QUITE EASILY cause a rift between the unicorns and pegasi (if i remember the pony types correctly). so perhaps some corrupt/manipulative ruler came to power after twilight's reign ended and catalyzed a racial divide for their own political gain much like trump was doing.