[WingsOfStardust]

Without the race favoritism, Thay just would not be Thay. If there was suddenly a Half-Elf Red Wizard running about, or a dumb-as-a-door Half-Orc as a Tribune or Thayan Knight, that would just be odd in a place like Thay.

And being evil is just the easiest way to rise to power within an evil realm, there is no-way an anti-slavery kinda guy would get far within..say the legion.

I fully agree there. If you commit to playing a subrace, you accept the terms in which the society views such and their possibility to live and thrive within the said society. In this case it being Thay.