At this point, I have to wonder if Americans deserve the reputation for being ignorant because if you talk to any Black person living in outside the US they'd tell you that they get called the n word or regional variants of that word because anti-blackness is a global affair.
Does the education system touch on how the US was built? That slave labor was the economic force? How they treated slaves and their decedents? I find it hard to believe that topic was never even touched on.
I feel like people are lying just to create a strawman.
Tbf, here in Spain, atleast in my school, we didnt study almost anything about the US.
Also, I have a friend that used "nigga" to call us, but he doesn't even talk english, he probably listened to it from some hip hop or something. So yeah, there's people out there that doesn't know the meaning of the word, you guys have to understand that there's a lot of people here that does't even speak english.
But, if someone speaks english, I don't think there's any excuse, there's a lot of US culture here, is impossible to avoid learning about it.
Also, even if you're ignorant about the word, I don't think this is the thread for asking, just google it.