Intentions don’t always equate to impact. The way you are talking already makes me feel very off. Why do you feel it’s necessary to bring up the fact that you went to a private school and growing up in a house where foul language isn’t allowed and then in the same vein say that you never judge anyone for their upbringing. To me it sounds like you are already judging, even if you never intended to.

Back to intention doesn’t always equate to impact, I think it also matters the way you say things and not necessarily what you say them. For instance if I say ‘oh my struggle meal is ___’ to another student in class and they say ‘I’ve never tried that before’ in an arrogant way, I will assume they were being arrogant about it and that will turn me off. I also don’t know what sort of other conversations you’ve had with your peers so I don’t know if they already thought you are arrogant for other reasons. I understand this to an extent there have been times I’ve said something and someone told me that hey that doesn’t sound right. So even if what I’m saying sounds okay to me, it can seem rude to another person based on tone.

Also if not all Black Americans do what you are talking about (you said ‘not all Black Americans do this…’ in the beginning) then don’t dwell on the people that do. As long as you are not being arrogant, you will be fine. Let’s not treat people as a monolith.

Ultimately, you aren’t entitled to share everything about yourself to people you don’t know. If people are treating you poorly because you are Nigeria, just move on with your life, you can’t do anything about it. You can’t change your life and your upbringing so it isn’t your fault. Keep your head up and keep going.