Obviously, that doesn't apply to some militant/separatist churches.
I became close friends with a Black gal through A-Anon. My husband who was now sober and in AA and I were invited to come to her wedding at an inner city (Baltimore) Black church followed by a reception in the church’s basement.
And like your experience, all the congregants and the pastor were warm and welcoming to us and to her other White friends. I found this wedding and the reception to be one of the most joyful weddings I’ve ever been to.
FWIW, Dylann Roof walked into the Emanuel African Methodist Episcopal Church in Charleston SC where he came to a Bible study, was welcomed and allowed to participate despite being White and not a member of the church. As members of the Bible study group began to pray, Roof pulled a gun out of his fanny pack and proceed to shoot, killing nine people.