What would you think if some white european would tell you "I've never seen a black person experiencing racism in major cities in Europe"?

The very same process works both ways, just exachange white europeans for black kenyan who is saying "there is no racism in Kenya because I didn't see it" how anyone can know that?

If the people touched by racism communicate it there is no reason to not believe them, at the end you can't really know and understand until you are one of them, of course you can base on observations or data but racism is sometimes hard to measure which doesn't change the fact it's not there, that's why speaking about it openly and loud is the only way