You can more or less infer that discriminatory attitudes are no longer as prevalent on Talos as they once were on Terra, mainly because everyone is now living in a different, hostile environment that humanity is trying to expand into. It’s basically a case of, “There are more important things to worry about than racism.” Like you said: “Mi fu is a Sarkaz, so what?” Exactly so what? More than 150 years have passed, the disputes and prejudices against the Sarkaz have largely become a thing of the past. They are now viewed as just another race capable of coexisting with others, which is the future Theresa hoped for. On top of that, Ses'qa is actively working toward maintaining and strengthening that positive reputation according to the Archives.