So wait, they have separate churches for blacks and whites, but it's still considered the same denomination? Like lol.
"The most segregated hour of Christian America is 11 o'clock on Sunday."
Where you attend church is often a good clue to your ethnic or regional background as well among whites. If you attend a Lutheran or Reformed church rather than say a Methodist or Presbyterian congregation, that's a very good indication you have German/Scandinavian or Dutch ancestry even if you are Americanized in every other respect.
It's more an indication of the ethnicity of the original white settlers than anything else, hence the relatively large number of Lutheran churches in my part of South Carolina.