You largely can't. I would suggest that if they're open to it (your black friends, that is) show them some of Colin Flaherty's videos on YouTube. You have to realize that the USA is now like the former Soviet Union. Dissidents get punished for making even the most reasonable arguments against BLM and things regarding race, gender, ect. You're not on your own as far as us fellow dissidents on the Internet are concerned.
Be careful who you share modern samizdat with, though, you could very well lose your job and possibly much more.
>>3Japan is slowly heading down the same road, I'm afraid. I just saw a few videos where Muslim kebabs are causing havoc in Tokyo and Nigerian dindus commit the usual crimes (one case was for embezzlement!). While they have freedom of speech with a more modern version of the First Amendment (Article 21 of the Constitution of Japan), they are also starting to crack down harder on their own dissidents than ever before (all this under the "right-wing" government of Shinzō Abe, who Japanese leftists refer to as a "crypto-fascist"!).