Island Believers

Let's say that one day a airplane lost its cargo of Bibles while flying over an island where the people had never experienced or heard of the rest of the world. (and by some miracle they all spoke and read the language in which the Bibles were written). Most of the people after reading the Bibles say to themselves and each other: "This book contains truth by which we should live! We will serve YHVH!" What would the practice of their faith look like? Would they build structures with steeply pointed roofs, long benches to sit on, wooden alter tables, and crosses? Would they gather on Sundays, Christmas, Easter and celebrating with ham, bunnies, eggs, and decorated trees? All these practices and many others that prevail in our churches would be completely absent. If some of these island believers were to cast out to sea (perhaps in search of the rest of YHVH's people) and land in a "Christian" country, they would not recognize Christianity as a religion based on scripture.