I’m not disinclined to agree with you, Much. Given the histories of the groups (Black and White) and the tension that seems to always rest on the line between them, yes, one could be inclined to perceive animus, or a threat in the words of the two Black kids who then pointedly mention the White kid as such.
The frustration end of the student who makes the comment about the Asian kid could also carry a particular weight given the local circumstances, but, yes, there is a concession there to the presumed innate giftedness of the Asian kid outside of any known tension.
The girl at the center of it does not deserve to be called out thusly, nor to wonder, due to the known histories and tensions, if there is something greater behind the verbal spewing. She must be concerned when it happens because if she is not then she is not reading the temperature of the room, and that could be dangerous.
For the same reason, the kids who spoke of her in this manner are not reading the temperature, either.
I would warn them, and then if it happened again, write them up.
I am, of course, familiar with the rather fluid, sharp-tongued and inconsequential manner in which Black people can speak to and with each other, and the manner in which those same characteristics can be present when one is just mouthing off about someone identified to be not-Black. (I was only reminded of it at your writing, but I am well versed in it.)
My oldest kid has had it done to him where it is the Asian kids calling him out, both for academic performance and his apparent failure to evince the requisite amount of Blackness in his personal tastes, extracurriculars, interests, etc. At no time did I think he was being physically threatened, but it unnerved and confused him, and let him know that he was a figure, a character/performer in others’ eyes, and that he was failing to deliver what his place in the community seemed to promise he would bring. (Needless to say, things hit the fan.)
It is not okay. Just not okay.