Yeah, we've got problems, but I would actually point you to our BLM protests as an example of our racial tolerance. They were almost completely nonviolent, well-organized, and incredibly diverse. Atlanta has a "we're all in this together" kind of spirit, at least in my experience. Casual racism is, for the most part, not tolerated.
Maybe you should find new friends.
I was born in ATL and lived there the first 20 years of my life and then for 18 months after college. I can say unequivocally that I've never been in a situation where it would have been acceptable or "just felt normal" to encounter that.
As a counterexample, I have lived in Atlanta for the past 7 years and never once heard anything like this. I'm not saying it doesn't happen, but it feels like you're painting the city with an overly broad brush.
Look at St. Louis and Baltimore. Much more brutality on both sides and riots. Atlanta isn't the old Atlanta and we don't tolerate that crap.
I'm sure it's getting better over time; most places in the US are. But, it's only been a few years since I last saw someone behaving in an overtly racist manner in Atlanta. I can't imagine it's changed drastically in that time. I'd appreciate if you'd read everything I've written on racism in Atlanta in this thread (and the other child thread). I'm not trying to paint it as a black and white thing, or suggest that Atlanta is the only city that suffers from racism.
It's the only major city I've been to where a white person dropping the word "nigger" (and used in a clearly negative way) not only happens in conversation, but it doesn't elicit gasps or any negative response. To be fair, it's also among the more diverse major cities, with tons of black-owned businesses, and that's awesome. So, it may be the clash of cultures (shitty old poor white southerners surrounded by successful black folks leading to resentment) rather than Atlanta being more racist. But, the south, in general, has such a long history of segregation, red-lining, private clubs that mysteriously have no black members, neighborhoods with no black residents, etc.
So, I'm probably being overly harsh based on surface level stuff. Opportunity is an important part of the power of racism, and Atlanta seems to have shown itself capable of providing opportunity to black folks; at least enough to lead to lots of black folks choosing to live there. Cities like Austin, Portland, San Francisco, etc. may actually be more harmful (or at least less welcoming) to people of color than Atlanta, without any overt signals of racism.