Why don't people believe that there is one and he made the heavens and the earth and all in between.?

I believe in The All Mighty !! How do you explain the comming of Profit Adam and Eve, Mosses, ,Jesus and Mohammed. Witch includes The New Testiment and The Old Testiment, The Tora, The Holly Bible and The Holly Qur'an are gide books that the All Mighty sent down to those who needed books for gidence,