Felars - mages used you as experimental toys and slaves, and that really pisses you off
Arials - You have wings, nobody else deserves to be able to fly, magic must be destroyed
Cloud giants - Cloud giant history has them being isolationists and reclusive. Magic allows others to intrude on your space
Dwarves - farging mages betrayed your kin and just can't be trusted. And the only way a dwarf ends a grudge is with the blade of his axe
male dark-elf - You want to end the grip that the females have on your society and the only reason they can rule the race is through magic
female dark-elf - You want to continue the matriarchy, and magic is something not to be trusted in the hands of males
Human xenophobe - magic created all the other races and without it, humans would be the sole inheritors of Thera