Minthara, to me, seems to disregard race entirely after she's freed from the Absolute. She retains some of her beliefs because a huge part of it made her strong, but it's clear she hates drow society and wants nothing more than to be free from it. Also, in her first meeting, she considers herself superior to you no matter what because she’s the Commander of the cult you’re stepping into. This point of view still holds true during that night of celebration..
I guess her gratitude override her racism as it should for most people especially after saving from death sentence situation.
