Apparently I ‘have to’ get a C-section because I’m white - WTF?

Okay so, heres the story. My fiancés grandma called him yesterday right after we just got home from our obgyn appointment. I had just gotten my 3-hour glucose test since I failed my 1-hour (I passed the 3-hour🙌) and I was feeling exhausted and so I didnt say anything to her even though she was on speaker. They got to the topic of our growth scan and how our baby is still in the 95+ percentile for weight and how beautiful he looked on the 3d ultrasound. She started talking about how they need to give me a C-section since hes so big and my first. Yes my son is big (3 lbs 6oz @ 28w) BUT my doctors have had no issues with his size and no big conversation about me needing any medical intervention at this time. I am almost 6 feet tall and not a small girl, I can definitely handle my own and all my family has had big boys with no complications. That being said if anything changed I would make the best decision for me and my son WITH OUR DOCTORS ADVICE. My fiancé (knowing I don’t like people saying how “they gwan need fi cut mi”) goes on to say “my other Grandma had a 13.5 lbs baby and she was fine! She will be okay too.” Tell me why this woman says “thats because shes a strong black woman, insert my name couldn’t do that cause shes white” 😟 WHAT!! She then DOUBLED AND TRIPLED DOWN. Mine and my fiancée’s jaw were DROPPED. His aunt in the background saying “I’m a nurse, I know she cant do it. If she tries she WILL hurt the baby” “I don’t care what anyone says I know she cant give birth to that baby”😦 Mind you shes in nursing classes that she doesn’t attend half the time. She has also never met me (lives in another country) and knows basically nothing about me besides my age and race. It was such a stupid and ignorant thing to say but when my fiancée’s mom called to ask her why she said that and to tell her it was racist and inappropriate she started screaming at her that “i misunderstood her” and “she doesn’t care because shes that bitch and she can say what she wants”, she then went on and said my fiancé was “acting white” because he shouldn’t have been offended by that and she will NOT be apologizing to anyone. That being said his immediate family stood up for me and made me feel very safe and comfortable, and my fiancé said he wont be talking to her until she apologizes to both me and him, which I doubt will happen. People say the most INSANE things about pregnant women! Edit: I appreciate all the comments telling me not to worry because of how inaccurate the weight results are, I am well aware! I am not worried and know how inaccurate they can be! They can also be accurate so I would rather prepare for a 10 pounder and get a 5 pounder than the opposite.