I didn't know there were white and black denominations, unless one has the word "African" added to it.
My brother and sister in law belong to a UCC. Over the years I’ve been to a lot of services there - weddings, Baptisms, funerals. This one is where my sister in law’s parents met and married so there’s a long history. I haven’t heard any of the hate. The African Americans at the services I went to were probably there because grandpa Fred owned a business which employed them but who knows. The most controversial thing I’ve ever heard was the pastor, just before the “consecration” said that some believe that the bread and wine are Christ and some don’t but all are invited to share.