I have never heard of a white “Reverend” either. Maybe it’s a Black thing.
A number of denominations use “Reverend” as a courtesy prefix for clergy: “The Reverend Mr. Lastname” or “Reverend Father Lastname” are the equivalent of elected officials’ being “The Honorable Representative Lastname.” The titles are used in the addressing of letters, and that’s about it.
You call your congresscritter “Congressman” or “Representative” or “Mister,” in every other usage, and most people call their clergy “Father” or “Deacon” or “Mister” or “Pastor.” Baptists seem to me to be more likely than other groups to address a pastor as “Reverend,” in speech, as in “Reverend Graham,” but I’ve never heard any use “reverends” in this way as a plural noun. They would say “pastors” to identify a group of church leaders.