Where do you live, Sara? I’m here in Tennessee, and I don’t see that “Southern Baptists” are segregated by race, at least not by design - I hope you didn’t mean that as an insult...
Our church has several black members, and some hispanic ones. There is no ethnic entrance requirement. But, you are correct, most Southern Baptist churches I know of are predominantly white.
And, I will agree that Sunday is probably the most segregated day of the week. But it’s not because I’m not welcome at their church, or they at mine. There are some doctrinal and traditional differences in how we worship, and we all choose to go where we believe like the other congregants. Most of the black churches in this area are not Southern Baptist, but many are other types of Baptists. Missionary Baptist (M.B.) churches in this area are common and are quite often predominantly black.
Everyone who believes that Jesus is the Son of God is welcome to attend our Southern Baptist church. And we would LOVE to have those who don’t believe that to attend as well, so they can learn... :^)
I live in Texas, but have lived all around the US. I did not mean it as an insult.
At the time of integration/desegregation, Black ministers did not want to change their church communities and maintained ‘black’ churches. That does not mean they don’t let people of other races in, but it means they have kept exclusive black Christian traditions of worship, music and racial causes going.
Maybe that is different now in some places. Not in Texas. We still have black churches and people will travel a ways to get to them rather than go to a white/hispanic church nearby. I’m shocked you don’t have black churches there!