A very difficult situation I was suddenly put in

I got called the N word by a couple of my first year middle school students in the middle of class today.

While my JTE (and the other teachers that have to watch the class because of how disruptive some of the students are) got extremely mad and both reprimanded and called the students parents; I don’t know how to explain to my BOE and students who witnessed it why it’s so bad and why they should never say it since I know they’re going to be curious about it and most likely ask the next time I’m at that school.

Any advice on how to navigate this extremely difficult situation? Because now I’m not comfortable teaching that class, maybe even the school.

EDIT:
First, I can’t believe I have to clarify this, but I’m a black woman from the States. I thought being called the slur would be enough of a give away to what my race is but apparently not for some people.

Second, I spoke with my BOE both on the day it happened (to make sure they understood the situation from my side) and today (almost a week later). It’s looking like I’ll be switching this school with one of the other schools another alt in my area has (we both have 4 schools each) so I won’t have to interact with those students anymore. Sucks because I really liked a good 2/3rds of students there and really wanted to see the 3rd years graduate, but I know if I was there I wouldn’t be able to teach the class with the bad students and well, they are paying me to teach so :/ sad it had to turn out this way…