If her wali refuses for unIslamic reasons such as race she can appoint another one such as older brother (if she’s Hanafi she doesn’t require wali’s permission anyway tho obviously better if she gets it). We aren’t expected to put up with oppression from parents, this is just brainwashing from culture. Like I said before parents are not allowed to refuse a proposal if their daughter/son wants to go ahead on the basis of race or ethnicity, it isn’t just my opinion:
‘culture alone is not a valid criterion to reject a suitor. The basis in the Hanafi school is that a woman has the right to choose whom to marry, and the guardian only has a legal right to refuse when the individual is unsuitable.’
Source: Marriage outside my own culture and frustration at the attitudes of our parents
It’s not a very full answer, I’ll find a better one and add here later..