I was referring only to the adjective “primitive”. Whatever the implications of a religious institution calling itself a Church, when modified by the word primitive, you have to wonder what religious doctrine is actually preached or followed.
Not being a Christian, I am not too familiar with their nomenclature/taxonomy, but I think it refers to a form of Christianity more akin to what Jesus and his followers practiced than a later and more organized form.
Behavior of the funeral attendees/visitors certainly was primitive in the worst sense of the word.