Bf’s mom is still not accepting of me and boyfriend defends her comments. What should I do?

My (31yo) bf’s mom latest comment was about how he can find a better well-off girlfriend since it’s not too late because he’s a medical resident and I am not. I met her 3 times in total, where I flew to her for the first two times from the Midwest to the east coast. She was polite to me and gave me expensive gifts. However, she expressed a few times to boyfriend how he would be better off finding a Chinese girl who is rich so he will live comfortably. When I tell my boyfriend that it is rude she keeps bringing that up even after we’ve been together for 3 years, he dismisses what I say saying it’s natural to feel that way because I’m not his race and I’m a 24 yo poor college student. This makes me angry and we fight a lot about it. Am I wrong for thinking that she’s racist and deep down wishing we’d break up? Thanks all.
Bf’s mom is still not accepting of me and boyfriend defends her comments. What should I do?
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