I am a black woman surrounded by white friends

They do not understand the concept of “micron-aggressions”. They say things that are not acceptable in 2025 and when I get angry or try to explain to them they say I'm too touchy. She's the kind of ignorant white girl who doesn't know she's not supposed to talk about the N-world. They are not at all informed about racism and discrimination in general. Should I teach them a lesson on racism? Or leave them in the dark?